How much compression should a 50cc scooter have


5:1 156. The Dawg Pound. A 4 stroke 80cc engine would have more "torque" (but less horsepower Cylinder compression ratio in two stroke engines I wrote this post a few weeks back, but its currently about 2 pages and only halfway done. I have a fairly brand ned stock clutch on mine so if that's not on this scooter that's no big Aug 22, 2011 · i have a Chinese scooter, and have had a few of them. so anything over 25,000m i personally feel is chancy for smaller displacement scoots If you've bough a fully assembled and tested scooter from a local dealer than they should take care of all the required registration. No scooter should have a drum brake on the front wheel, I have enough reason to complain about a disc drum combination but dual drums are just ridiculous. I will refrain from going into my disc vs. However in most cases these modifications … you need to read, research and feel comfortable that you have a basic understanding of every step before you even touch a wrench. If it's lower than 100 psi, you can try and squirt a little oil into the cylinder and try measuring again. 100 psi would be about right for an engine with a 8 to 1 compression ratio. If the scooter does turn over but still doesn't start you have to check for a spark and make sure gas is getting to the engine. Ebay sells this scoot but finding a dealer here is almost non-existant. I'm with Stephen Malbon, modern bikes that have an automatic choke are pretty much good to go right away. Jan 13, 2018 · However, on a scooter which has already been tuned up to stage 2 you have some power to play with. I just recently purchased a 2003 Yamaha Zuma (I believe 50cc) scooter. Dec 19, 2013 · It is a 50cc TaoTao ATM50-A1, 2012 model, just as in the title. I was figuring some one who has used or bought some of the above mentioned parts may know. Cheers May 17, 2012 · The Ultimate Scooter Tuning Exhaust Test and Comparison - Find the best exhaust for your scooter and see how fast your scooter can be! Browse: Home / Reviews / Exhausts / The Ultimate Scooter Tuning Exhaust Test (70cc Sport) Thats the reason i want to build one. Well I had a brand new 80cc barrel and piston hanging about from doing my While a few scooters have 16" wheels (e. That doesn't seem like much but regular gas engines make around 2. The thing I like most about them while someone is still making payments on a good brand name scooter I can buy 4 or 5 of the cheap ones. Well, technically the Ruckus is a 49cc scooter but a … Apr 08, 2017 · Premium gas is designed for high performance engines. again it starts only with shorcutting the startyer relais. Supercharger Kit for 50cc motorcycle, bike, moped, scooter [Category : - Automotive Accessories ] [Viewed 21089 times] Brief Description of the Invention: Supercharger Kit greatly improves traction performance of a very common 50cc -350cc four-stroke engine. That's the oil/gas mixture burning, no big deal. Im not up grading to a 70cc due to legal reasons. Aug 05, 2011 · How to check the compression of your scooter's engine using the proper tools. Something will break, a cheap molded hose will crack, and it will lead to the destruction of the bike. I pulled the plug and checked for piston travel and all seemed well so I pulled the head. A mechanical slide type is used on the 50cc units, and a constant velocity (CV) style is used on the 150cc four- stroke units. A small fortune doesn't have to be spent to get good tools, but the 80-piece socket set for $6. Assuming that checks out OK, what else should I try next? I have spark, and after repeated cranking the plug is moist with fuel, so I think I have spark, fuel, and compression, but it won't even sputter, nothing at all. Wiki User June 10, 2013 8:37PM. Now it has about 7,500 miles on it. assuming all maintenance and repair was done i would say for the 125 and 250cc scooters 25,000m. But even an old, tired engine with only 60-80 psi should run. Grips. Premium gasoline is designed to be used on engines with high compression or those with turbocharger. I would never have guessed from your posts that you are not in the USA, sorry, I know to a lot of the world that would be an insult, it is not intended that way. buuuttttt i found out that basically the honda SE elite 50 is the same as yours and the service manual for this one said compression should be between 114-171 psi. Crank the scooter until the needle on the compression gague stops moving. 002". 00 worth all together. component of the carburation system, any air leaks in the crankcase can cause a compression issue. Burning hi octane gas in low compression ratio engines is ok but costs you more money for no power gain. Mar 07, 2010 · My 2002 50cc zuma hard starting, when it does start it smokes a lot then dies unless I manually choke it my holding my hand over air intake, thought it was low compression, so I replaced piston, rings, and reed valve. When this happens the internal clearances of the engine open up and two-stroke engine loses compression. Jan 29, 2020 · The 50cc gas street legal scooter is CARB approved, street legal, and can be safely driven around California without any worries. nycscooterparts I know alot of guys on here love their compression testers and their minimum compression reading for a saw to be a runner. Jan 15, 2016 · Znen T6 Review: Based On 1100Km Test Ride By Team BikeBD. Poor thing was abused. Dec 03, 2012 · Most local laws that qualify this as a moped require that a 50cc scooter go less than 30 MPH (48 KM/h) on a level surface. Hill-climbing may become impossible; you may even have to help your scooter on mild inclines. 2020 Ruckus OVERVIEW - Honda It’s often said that the simplest answer is the best one. Low compression. There was no warning of this it completely cut out, when i revved it nothing happened. The best scooter models will have a sealed headset that will have a much smoother operation. The Honda Elite 150 offers a top speed of 65 miles per hour, according to "Motor Scooter Guide. Doing a compression test on a scooter and making it a adapter out of a spark plug The ideal pressures for an average 2 stroke dirt bike at sea level that is not heavily modified should be in the vicinity of the numbers below. I was wondering, how do you know if a 2 stroke engine is running too high a compression ratio? I cant hear any pinging, and just wondering what kind of compression should i get for a GY6 150cc Chinese scooter motor. Brooklyn street's are ruff, and you need a really good frame. No matter how hard you push your thumb, the compression pressure should blow it off the hole smartly. 2 stroke engines mix gas and oil and so have no engine oil to be changed. Once you have it running, you can fine-tune. 5 to 1 compression ratio which means they could burn low octane fuel or what ever your Mfg manual recommends. MC-U1504), most scooters have a 12" or 13" wheel which is a reasonable compromise between maneuverability and stability. A down and dirty way to do it is to simply press your thumb over the spark plug hole and hold it there tight. My scooter will not start • Make sure you have fuel getting to the carburetor. Hey Wombat, Was going to use the IHI RHB31 turbo, and for what im doing i dont need the right license and buy a bigger bike cos the purpose is to tinker around with 50cc scooters all just for fun lol. Nov 05, 2010 · This Site Might Help You. some says 100-140 but some says 200+ and i don't have service manual. Some of the photographs used show the engine removed from the scooter. Mar 02, 2010 · what value of compression would like to see in a 50cc 2 stroke engine? i`ve got fuel and a reasonable spark but the engine does not start, the battery is not very good and is on charge, but i think the compression is low, last night whilst riding it, it back fired and cut out and hasn`t started since, could i have blown anything? i`ve removed May 11, 2014 · Compression Ratio 10. The engine has GREAT compression around 215psi Apr 01, 2018 · I have checked the switch by connecting te wires directly, but still won’t start. There are three main compression systems namely the standard compression system, hidden internal compression system, and the inverted compression system. It is not necessary to remove the engine from the scooter. . 1 to 2. You should see 80psi or above for a stock, well broken in gy6 50. The hose on my test equipment is a bit long, so I believe SCO138 50cc Scooter Automatic Transmission, 12" Alloy Tires, Air Cooled, Front Hydraulic Disc/Rear Drum Brakes, Electric/Kick Start, Rear Trunk. ) you're scooter has a 2-stroke 50cc gas/oil-injected engine. Hey gang, Question for those who have more knowledge about these things than I do. 4) Should be great for hills Jul 13, 2007 · With your height and weight, you should be looking for a scooter in the $1450 to $2000 range. Too much or too little fuel will cause you issues. I was riding one day doing maybe 35 and it lost power. This scooter did start and run with only 90 psi of compression. Check engine oil level or quality in crank case. Some of them are internal -- like bad rings -- and can only be found by disassembling the   Here's how to perform a compression test on a 2 or 4 stroke dirt bike, Including A 50cc, 60cc, 80cc, 100cc, 125cc 200cc or 500cc should be able to squeeze out a If it's determined that the top end IS in need of being rebuilt, you should get a   Model Numbers: JL50QT-18 - JL50QT-X1/8 - JL50QT-14. Piaggio Zip 50 parts on Amazon…. 66mm. Have spark and fuel. 110 psi doesn't seem bad for a 50cc bike though. 2-Stroke Squish & Compression Testing . Cheap gas burns/explodes quickly, so with less oxygen it burns/explodes slow like high grade gasoline. I read that a high compression head can increase performance so what is it, are they any good and will it change the performance of a 50cc? First check the compression with a gauge, if you have one (remember to have full throttle when measuring). After I installed the big bore kit, with the exhaust big valve head, Keihin carb the scooter has a REALY hard time turning over, it takes a much more former to turn the flywheel over now after the I went ahead and ordered the engine. For this reason, we ask customers to send us a squish test (solder) and a curren 50cc Scooter No Spark. It's important to buy good quality tools. Gas Scooter was driven without an air cleaner. 5 but my typh has a 70cc kit, racing clutch, lightened flywheel, boost bottle, performance exhaust and a 21m carb, and ive spread-ed the rollers out in the variator like so - 5. A 50cc, 60cc, 80cc, 100cc, 125cc 200cc or 500cc should be able to squeeze out a reading of 120-190 PSI. 5 hp. That is a big increase. You put the compression on the fork with out a top race for the headset. In fact, if you consider anything more powerful than you have to either compromise fuel efficiency or spend some extra bucks on maintenance. a. I have a Piaggio Zip 50cc 2T which is standard apart from the washer removed from the variator. You should have at least 100psi compression. I have installed a high performance exhaust and a 90 carb jet. 1 Mar 2013 However, if you have too much compression, it can cause your moped to 'knock' or 'ping' which means you are pre-igniting. (I just worked on a 50cc gy6 and got 150# on a 2005 motor with 2000 miles on it) If it had been running good and quit suddenly and has 30# of compression you have valve problems period. In order to remain familiar with the proper service procedures, authorized technicians should periodically review this manual. In contrast, I got 12,000 miles out of my 1985 Honda Elite 250 before everything needed Aug 29, 2013 · Scooterists will also have the opportunity to detail the challenges and barriers that they face while riding scooters in Chicago. Only has 80km on it. Spacers. Hi. Put a BBK on my bike. g. The engine   The Yamaha Zuma is an air-cooled 49 cc two-stroke scooter made by Yamaha Motor Company This article relies too much on references to primary sources. All it does is contol the combustion so that more of the power can be extracted when it's being used in a high compression engine. May 20, 2014 · Hi guys i have a gy6 50cc scooter upgraded to 100cc or 50mm bbk. Look for at least a 12" wheel 50cc scooter. KYMCO AGILITY 50 / 125 The Agility series of scooters features modern and sporty looks, clean burning 4-stroke engines and unbelievably low MSRPs. The scooter goes up to speed much faster but still will not go over 30. High octane fuel does not have any more energy than regular fuel. For a 400, high mileage can be between 60-80k where as a 50 will generally be pushed to the limit much closer to just 10k Apr 17, 2013 · 2003 Zip Cat 50cc in blue. Sep 20, 2019 · If you live in high altitude, use low octane regular gas. Came exactly as pictured and was easy to assemble. k. If you don't, there's a problem with the Kickstarters shear the teeth off gears or can break the drive belt cover, the scooters lose compression really quickly. My scooter (50cc w after cooled) won't start. Take it to a scooter or motorcycle shop and ask them very politely if they'll test the compression. How to derestrict a 50cc Scooter – On a general note. The trouble with petrol is that if it is compressed too much it starts Honda builds special 'Kumamon' scooter. But there is a very small oil leak and i've noticed that it drips on the exhaust manifold. 2 mm. Wasif Anowar January 15, 2016. The procedure should be pretty similar on 50cc and 250cc models with 4 stroke engines. CA Legal. This should take no more than 5 seconds. The idea of rebuilding an engine could involve anything from simply replacing the rings to replacing a significant portion of the engine I figure I'll have to fabricate a new engine mount to bolt up to the frame, and i'm trying to keep it looking stock, none of this garbage with the engine and tire sticking out 2 feet behind the scooter, mainly because if it looks stock, the LEO's will pretty much ignore you, but a modified scooter will get looked at, and why give them an There is probably no need to drain the oil, I wouldn't waste my time on that. I have a 2005 eton beamer ll with about 3000 miles on it. Mar 18, 2011 · well it depends how the scooter has been cared for. Anytime you run a two-stroke motor, the exhaust will have a blueish tinge. You should be using premium grade gasoline and at the very least an API service TB grade 1 (or higher grade: like 2,3,or 4) two-stroke oil- NOT motor oil in the oil reservoir for the gas/oil mixture. I've had crankshaft bearings (one, actually) go bad on my 50cc Peugeot Speedfight 50cc (water cooled, 5hp+, one of the faster ones - read - revs more then average) at around 15. 5:1 compression ratio, coil ignition with no advance-retard mechanism, and fixed timing position. Save yourself the $200 assembly fee, and do it yourself. I have spark and fuel and have cleaned the carb. ( Models until  1 Apr 2018 So, to get your scooter to start with an electric starter, the following components more power to the battery than was used in the first compression; Fuel floods into the Now that we're familiar with the way that things should work let's look at where Best 50cc Scooter Reviews: The Little Engine that Could. If you don't have a gauge or just don't think loss of compression is likely, at least do a touchie-feelie test. Both 50cc and 125cc models were originally introduced for 2007 in the USA and they continue to both be sold in the USA as of 2019. Here's the link for the formula May 11, 2014 · Compression Ratio 10. Here's the link for the formula That 213 sounds high. The other day it suddenly lost power and stopped; fortunately in the driveway. cos if engine is bad i'd change the whole engine instead of drive belt. rollingwrenchdenver. Because the surface of the parts is not that smooth, they need a time to run-in to have the parts get smooth and work together better. Good luck and enjoy your special discounts. 7 will give you the compression ratio for the QMB 139 GY6 compression ratio. The smaller models with 10" wheel's will not accommodate your size. My GY6 scooter is a 50cc TaoTao ATM A50 (2012). 2 strokes need compression to start and run. The Zip Cat 50cc was a 4bhp, 2 stroke scooter released in January 2001 in the UK by Piaggio. BUT, turning it in TOO MUCH will cause the motor to run lean at full speed and can burn a piston. I pulled the fuel hose from the bottom of the fuel filter and gas flows good 2. 2-STROKE OR 4-STROKE? If you’re in the market for a 50cc, 80cc or even a 125cc scooter, the question of whether to get a 2-stroke or 4-stroke scooter may be on your mind. I purchased this scooter because I am *VERY* poor, and can't under any circumstances afford a car (like most of my generation), so I intended to drive it during winter as it rarely snows. So, it is only logical that you go for a 50cc scooter if you don’t have the means to spend extra cash. just de restrict it and it should do 40 which is safer then 28 in my opinion and if you insure it as derestricted and have L plates that covers the licence angle. Still have 40 psi. 0. Jan 21, 2017 · Im getting a new 50cc cylinder for my lads scooter as his is worn. GY6 50cc power loss after 245km. You'll also need a precise way to measure bore and stroke/depth, a syringe or buret to measure volume, a spark plug that fits the head you're testing, a piece of plexiglass, and grease. Sometimes they come loose. RE: whats the difference between roller weights for a 50cc scooter? i'm new to the scooter/moped thing, and am a bit conffused wots the difference in the weight of the rollers and wot is the best weight to get for my sym symply 50cc? Scooter Community, Scooter Forums, Scooter Blogs . Welcome to Part 1: How to derestrict a 50cc scooter. A new engine should read somewhere around 140 psi. I had this scooter since 12k mile mark and I've put about 7k miles on it in just over a year (courier stuff), and the scooter was just short of abused As some of you maybe aware by my other post's on the forum I have picked up a brand new engine not even in the frame yet. I have a Jonway 50cc wide body scooter that I just put an 80cc big bore kit on. GENUINE ROUGHHOUSE R50 The Roughhouse R50 is a sporty 50cc 2-stroke scooter from Genuine Scooter Co. The only way to fix this, is with a total engine rebuild. I ran perfectly like a charm before the big bore kit. I'm guessing the scooter is a two stroke, since most 50cc's are. 95 Shop for SCO138 50cc Scooter - Lowest Price, Great Customer Support, Free PDI, Safe and Trusted. Bearings. 5 psi divided by 14. 0 mm x 39. Should you not already have an eBay account, it is simple to open one while acquiring your 50cc Scooter, just click on the item that you to purchase and you will be taken straight to the main eBay site whereupon you can sign up for an account at the same time as making your 50cc Scooter purchase. Normal. 120-150 psi is normal for most automotive purposes. It may sound like the engine is running OK, but it will lack power. Apr 03, 2008 · It's a relatively unknown 50cc Scooter and is also called the Rex. 5 - 7. If you're seeing anything below that, then it's time for a new Oct 18, 2012 · okay; The lighter the rollers are the better acceleration you have; Heavier the rollers are the better top end you will have. since the upgrade there has been more difficulty starting the engine. I could but, it would be very noticeable and above the legal 50cc and to much power, I have a race bred 160cc pitster pro engine in my 1974 Z50 for that it goes 70mph. • Check the wires behind the fuse holder and the charging jack. Such a headset requires a compression system and a threadless fork to work, so it’s a bit more complicated. 50cc scooters 2008-05-13 14:12:08 by GenElec. I hopeing when racing kicks up around here we have a 50cc class (anything goes as long as its 50cc) so i can go and kick everyones butt in the 50cc class. These 50cc scooters are intended to fit the needs of a wide array of potential riders. These with the 63 are jetted only for 50cc. All you have to do is pay the dealer and your fully registered and inspected scooter should be delivered to you. The installation shown here is being done on a 139QMB 50cc GY6 scooter engine. Dec 10, 2014 · 50cc to 200cc. It's good to have on hand, but if an owner plans to do their own maintenance, more tools will be needed. 2 gallons of fuel. You should see a spark across the gap. Now have someone kick the engine over. However, the influence of horsepower can make a CC number deceiving. The Roughhouse continues to be sold as of 2018 as their sporty 2-stroke 50cc offering. Their terrible scooters in my opinion. You'd be surprised how much money you go through when paying something off. If the valve clearance does not match up to your desired specifications, loosen the nut securing the adjuster using a 9mm wrench. But it should only be a slight smoke, not lastingand if you had new rings installed, not much at all. I wouldn't worry too much about the dvla bit the best they will do is fuck up/lose the paperwork. Dec 09, 2019 · Best 50cc Scooter. A big issues with scooters is life expectancy. Thanks for asking your scooter questions about scooter running and stopping issues, and please check back often for new answers and comments. " Dimensions Sep 04, 2009 · I have just bought a 2008 50cc scooter, its a Sinnis Strike, im only getting 30mph out of it, i wanting to make it go faster! Please can any1 tell me how/wot do get done to the scooter to increase the speed? Buy GOOFIT Big Bore Cylinder Rebuild Kit for GY6 50cc 139QMB Racing Scooter Parts 64mm Valve: Cylinder Heads - Amazon. Very roughly, 100-125 psi is good, 125-150 psi is very good, and 150+ psi is great. Sep 06, 2011 · Introduction It is a very widespread misbelief across tuners that two of the easiest tuning improvements are cutting off the piston skirt and removing the lower piston ring. Most motor scooter engines are under 10. That being the case, there is a huge catalog of possible parts, depending on the scooter model. a. Even i dont want to read it, so i'll try to condense the knowledge and answer most of the questions i've been getting lately about combustion dynamics and compression, without boring the heck out of everyone. R. Piaggio Zip 50 Cat Specs…. I also get it started and leave it at idle while I sort out my bag, helmet and gloves. The higher compression ratio the higher the compression test readings. MC_X1507) and a few have 10" wheels (e. Ask your unique question using the form below; Common Questions About Scooter Repair & Maintenance. Even 125-150cc GY6 procedures should be nearly identical. I was a little surprised to see that the compression is about 215 psi. Those engines have a smaller combustion chamber in order to increase the power of the gas explosion caused by the spark plug. Performing maintenance on your scooter will make your warranty null and void. 49ccscoot. 139QMB / GY6 Big Bore Kit Installation. I had read on the Mineralli builds for the 100cc engine that our mate GTVert was getting 175. Just a thought. There are certain parts I keep on hand at home, probably around $100. Spark should be at or just after top dead centre of the piston. COMPRESSION: Get out the compression gauge and have someone crank the engine for you. R for a ride and have a coffee Sep 23, 2015 · via YouTube Capture. with the one from my scooter – no change. 1 Mar 2011 A lot of scooters and go karts are powered by a 150cc engine based on the on the modifications you make to your engine, you should boost compression too much (and need high octane race fuel), GY6-50cc-150cc. There is also a third rule . 5 -7. 18 Apr 2019 ProX parts provide an affordable option where replacement parts are needed. Then you put on the What I'm going to describe is how to change the engine and transmission oil in a 150cc chinese scooter with a 4 stroke engine. Let's also say its cylinder has a combustion chamber volume of, for the sake of easy calculation, 50cc. 275 cubic inches. Aug 12, 2012 · Ok I got this scooter at my house that I acquired for free and I am having a hard time with it. At some stage Honda used Kymco, a Taiwanese company, as a factory for Honda bikes. Since the Razz was Yamaha’s entry level 50cc scooter at the time (with the Jog being the higher end 50cc), it used a low cost version of Yamaha’s Minarelli engine. _____ Apr 12, 2016 · Need help with a 50cc TaoTao Discussion. If you're getting fuel, spark, and valves are good, then you may have a compression issue caused by a worn top end. Have spark fuel and compression,gy6 wont start help please I have compression of 150+, Get scooter parts from tvnacman at www. Review: ” This was my first scooter, loved it. $759. 283 by 2. Changing a previously chosen part may remove one or more of the parts Home » Build a scooter Have A Question About Getting Your Scooter to Start? If you have a question about starting your scooter, ask it here and we'll try to help! But, please scan through and make sure someone hasn't already asked your question, so we don't have duplicate questions/answers on the site. I just changed out my carb from the sealed carb and put an 88 in it and it runs much cooler than it was. If your engine is running rough (stalling, sputtering, hard to start …) swapping in a new spark plug should be your first diagnostic step. Jun 10, 2013 · How do you put together a scooter with ihc compression? Answer. The PC50, though much smaller and lighter, had some similar features to The engine has an 8. What do I need to do to fix this Apparently, a 50cc scooter will offer a much better mileage than a high caliber vehicle. Compression ratio: 7. Please understand that this service manual acts as a general guide for KEEWAY’s entire line of 50cc, 2-stroke scooters. They are also usually limited to 3 horsepower or less by law. Replaced piston, cylinder, head and valves. Never turn the screw more than 1/8 of a turn at a time. Did a compression test. The GY6 engine design is a four-stroke single-cylinder in a near horizontal orientation that is used on a number of small motorcycles or scooters made in Taiwan, China, and other southeast Asian countries. A compression gauge only tells part of the story. Whether it is the old trusty beater that has a few too many miles on its rings or the new hot high RPM engine that was tuned too lean for its initial run, you'll need to rebuild an engine in order to get the maximum number of miles out of the same parts. Now you should be able to turn the adjuster with your fingers. When you change the plug, check the compression. 0:1 The scooter also has 155 mm hydraulic front disc brakes and rear drum brakes. Like and Subscribe for more help and visit us at http://www. GY6 50cc/150cc Scooter High Performance GY6 50cc/150cc Scooter High Performance Explained The Chinese scooters using the Honda Clone GY6 engines lend themselves to a complete line of upgrades that will get the kind of performance you can use to commute in traffic and safely get around for very affordable scooter. Here is what I have done so far. i have no clue is thats right or anything but its the closest i could get man Doomsday, I have the same scooter as you. The compression system basically refers to the manner in which the components of the scooter such as the frame, the bars, and the deck are attached. Question: What type of motor oil is best for scooters? Answer: I'm not sure there is one right answer to this, but the prevailing wisdom seems to be that you should refrain from using synthetic motor oil for the first 1000 miles. Questions to ask yourself! i . Most modifications that would make this scooter any faster than it is will also make it illegal. I was using a 72cc big bore kit. This exception does not apply to all scooters however. Im not familiar with your scooter but i bet its only naturally aspirated engine. Znen is one of the leading scooter companies from China & in Bangladesh all they sell is scooter to the local market, day by day they are becoming very popular among the scooter lovers in Bangladesh. Wheels. I would start looking at ignition timing or I've done this before, left a rag in the intake and mounted carbs, started it and had the same problem, no revs but did idle just fine. I have a 2010 tao tao 50cc that I put a new carb on and the bike want start the only way I can get it to start is to take air filter off and pour a lil gas in the carb and it starts right up and runs, 1. 13 Jan 2018 Most scooter riders who want to boost the power of their scooter are happy to do so in Some 50cc's (TGB scooters in particular) may also require a We also have an instructional video below which should give you a good the belt much stiffer, which can have an effect on the operation of variator (not  Engine Seals - If you didn't split the cases then you should not have to worry about this. The scooter lost speed really quickly aswell like i was braking when i wasnt. Try turning it IN about 1/8, this will help the top speed operation. Unless a hole in the piston just popped up, you more than likely have a valve that is stuck partially open for one reason or another. 3. The initial run-in should be at least 500KM. Compression. A 250cc should be in the neighborhood of 170-240 PSI. I think the tax class just says "bicycle" on most up to 125cc. Pre-ignition is bad,  2 Sep 2014 I have 20+ years on cars, trucks motorcycles and scooters. rings on a sport cylinder every 1500-2500 km to keep compression levels high! to derestrict a 50cc Scooter Hello Daniel, I have a I don't have a compression gauge, so that's why I don't have a reading, but I'll get it measured as soon as I can. The electrics also have been known to pack up aswell. My problem began when the temperatures dropped and it got cold. In most states, any engine with more than 5 horsepower must be registered as a motorcycle. now it does not start unless I kick start it. A dog attacked me on it and I wrecked there was a little cosmetic damage but it still ran like a trooper. If you don't have this level of compression then you have bad valves and/or bad piston rings. Nov 05, 2010 · Boring out a motor or increasing its stroke gives more power not only by increasing capacity, but also by boosting compression. didn't work so I replaced the card thinking it was the automatic choke still nothing, wonderring if it might be coil or stator, if I take out the plug and turn it over there is Hi i have a RoadRunner 50cc Calssic Scooter made by iScooters and my scooter would not even run when i got it, but then i put a new spark plug in, new petcock and petcock filter in, new in line fuel filter, and new gas. I replaced the whole carburetor and have put in a new spark plug, a performance CDI (AC) and a performance air filter. Calculating Two-Stroke Compression Ratios You'll need your cylinder, piston with piston rings, head gasket, and cylinder head. In my typhoon ive got 5. The electric choke stopped working properly and that made my engine die if I revved too fast or too slow -and the scooter was slow over all. the bike will probably run on down to around 100 psi but will be very lacking in power. 1:1. Aug 22, 2010 · Ok, so i have a 2004 Vento Triton 2-Stroke 50cc Scooter. You should always try to ride within your skill level, and a bike with too high of CCs could be dangerous if you're not ready for it. But I am having an unusual issue. If you are trying to repair a motorcycle that has loss of power, or simply won’t start, a compression test should be first on the list. 5 Nov 2010 The mysteries of compression ratios investigated and unravelled Say we have a 500cc single-cylinder engine with a bore of 100mm With the piston at TDC, the volume is reduced to 50cc. Engine Power The Thunder 50cc gas street legal scooter has a reliable 50cc engine that will keep you going at around 35MPH for over 100 miles using around 1. This scooter is fitted with a 150 cubic centimeter (cc), water-cooled, four-stroke engine with a compression ratio of 10. How much compression should I have on a 50cc 2 stroke? I had my Suzuki apart, and when I had assembled the motor again, there was only 100 psi. When I turn it over it fires weakly and burnt exhaust gasses come out of theintake side of he carb. 5-12. or bearings, your first thought may be, "how much is this going to cost me? This is a high compression piston!5mm taller than most standard 50mm pistons. purchased a 2008 50cc scooter from a college kid. If you live near sea level use a higher grade octane. 5 - 5. On some scooters (TGB 50cc’s and SYM Jet 50’s in particular) this upgrade can be added earlier on than stage 3 without having too detrimental of an effect on the acceleration. Should I use unleaded gas or a higher grade to run my TaoTao 50cc scooter? by Kyle (Nashville, TN) I actually have a simple questions to ask. I looked and on your first post you did let us know you were from the other side of the world. Just make sure if you are running it that high on the RPMs that you have upjetted so you are not running lean. I'm trying to find out what else I should consider on ordering. Aug 24, 2009 · anytime the compression drops below 125 psi, you should start expecting to do a top end or at least ring(s). Rules, New Member Introductions, and Forum Information. i also connected directly the brake wires, still not starting. he put the compression tester on my bike and it read 125 and it need to be 150 he said i would need new piston and Apr 22, 2013 · I have a YZ144 done by Eric Gorr and ported for low/mid powerband and pump gas. The factories find ways to cut production costs as much as possible and on some of them, they are hard to get parts for apparently. Scooter does not turn over. com Dec 28, 2012 · Here is a good example of low compression on a scooter. Do I need to reduce the combustion chamber volume to get the PSI up? Would 150 psi be safe? Jan 17, 2011 · So how do you test if your engine has compression? I show you the most simple and quick way to test, and explain what can cause bad compression, then I take K. It had 3000 miles on it when I bought it, best scooter ever ! Love the Yamaha Razz, wish they still made them cause I would suggest buying one to anyone wanting a scooter. Then we use local slang and you might have a hard time understanding where it is coming from. com FREE DELIVERY possible on eligible purchases Idle speed should be approx. General Topics (No scooter Zone) Pics and Vids. It is believed to have originally been a Honda design. If your looking for a highway capable scooter, most brands will probably easily last past 50k miles with just minor matinience. • Check the spark plug for sign of wear and tear. Since many vintage engines have been “in the hands” of numerous mechanics in the past, there is no assurance that cases, cylinder decks, and heads have not been machined in the past. You can purchase these products at www. Does anyone know how much compression a Aprilia Habana should have in Bar? Got this fella as my first scooter! It'a two stroke 50cc Piaggio Liberty. Doesn't say anything about the varistor being there, would be nice if there is a stock ready to go one on it with fresh variator spacers/slides on it. 50psi compression on 50cc chinese scooter QMB139? ScootDawg's Scooter Forum a. May 27, 2009 · They come in either 70cc or 80cc, but usually come with higher compression pistons. . Say we have a 500cc single-cylinder engine with a bore of 100mm and a stroke of 63. I'd have to Should I take the carb out and clean or soak it or should I just leave it in and spray it. If you have one, you may have to find similar parts from other scooters to keep your bike on You should be able to start and operate the scooter with this setting. GY6 50cc bolts on all engine covers should be scooter, make sure that all moving parts tMake sure that all wiring harness retainers are Test compression pressure determining too much. Mar 23, 2015 · A friend of mine gave me his old 50cc scooter that used to run untill his uncle did something to it. Here’s a video General Trouble Shooting Tips for Mopeds Scooters My scooter is not charging • Make sure the fuse in scooter is good. Pros: + CARB approved (street legal) Mar 13, 2010 · dang you were right this was hard to find . Though it's another Chinese clone, an established dealer will best take care of warranty and other necessities. I have a 49cc scooter that could only do 33 MPH maximum, but my state MVB says that the most I'm allowed to go is 30 MPH. Stock, it topped out around 40 mph with my 150lbs. But it was still running until i pulled over and it would not start again. This seems high to me. its a 2014 taotao 49cc. Throttle cable has stretched. I have 40psi compression. whatever you can get in there the compression should puff your finger Along with that I will also explain which parts should be installed first when starting tuning a scooter and which ones need to be replaced when getting more serious. All i need is a small boost. The starter spun it over like crazy so I figured it had little or no compression. Aug 05, 2015 · Hey I installed a 50mm big bore lot on my 50cc taotao 2014 scooter. Abnormal. If that gets your head nodding, then the 2020 Honda Ruckus is the ride for you. To check for a spark, remove the spark plug from the cylinder, hold the tip of the plug against the cylinder head and crank the engine. Mar 16, 2014 · How do you fix low compression on a scooter 139qmb motor it won't start because I have less than 100 psi of compression. However if you've bought a scooter through our website you'll have some work to do. For example, a screaming 2 stroke run at 12,000 rpm does not have much torque -- it relies on the engine momentum to do work. org. 5 etc so good acceleration and good top end. Again, it is best to check these simpler (and potentially less expensive) problems before assuming you have low compression. Top 10 Scooter Problems & How to Solve Them! Posted October 28, 2009 The following information is for informational purposes only. it used to have a problem before that it would start and rev really high and shut off. Jun 21, 2014 · How To Maintain A Scooter. Griptape. I just think it would be cool to have a mean 50cc motor, and when people ask what size is it you can say its still a 50. 5 and 7. If you wish a vehicle to assist you to get around your city and neighborhood, the best 50cc scooter would possibly simply be what you’re wanting for! everybody that has ever closely-held an automobile is aware of however inconvenient it is to drive at the hour. Even in the cold. i am sure the scoots would still have plenty of life left in them and their engines, but just how much can become quite varied scooter to scooter. Most belive that these actions lead to decreased friction which improves cooling and therefore increases the power of an engine. While this is a frequent symptom of compression problems, it may also be a symptom of clutch or chain problems. Mechanic's Assistant: Have you noticed an increase in fuel consumption? And how does the motorcycle start—same as usual? Doesn't start. 8 volts at the battery. If you didn't find what you were looking for here, feel free to check out our archives of old scooter running/stopping questions. com. The Honda PC50 is a moped produced by the Honda Motor Company in Japan from May 1969 until February 1977. Minimoto Questions: Ask Mini Moto Questions Minimoto questions and pocket bike questions answered, What is a pocketbike or minimoto?, how fast are minimotos? all questions answered here Want to make Hundreds of Pounds a month by selling our Minimoto Guide all you need is an email account and if you have a website you are laughing for more Love my new scooter, so much nicer in person! I put the Icebear Shadow on layaway payments and had it paid off a lot quicker than I thought I would. Your Flyscooter should be looked at by an authorized Flyscooter dealership. The bore and stroke on the Honda Elite 150 is 2. I believe the scooter is actually a 2 stroke and the extra oil could be caused by to much premix. That's why I'm suggesting a high end scooter. How do I know if the spark plug in my Buddy 50cc scooter is bad? Pulling the plug out is a good part of routine maintenance, because even if the plug is working OK, it’s a great diagnostic tool for your engine. I'd have to check the specs, but I would be looking for 115-120 psi with a compression tester. I used to fix scooters for a living, so I know what I am doing. I've heard that when doing a compression test on a 2-stroke you should hold throttle open. Fast vehicles are dangerous. I just purchased a new TaoTao 50 moped scooter and wanted to know if I should run it on unleaded gas or use a higher grade? How is the life expectancy of a 50cc Chinese scooter engine? Unless you have a 1 year warranty from your chinese scooter dealer, and unless you yourself are a scooter mechanic (you will be once you've had your scooter for a couple months because all the shit you need to fix) you can expect your first scooter to last you around 7200 miles to The quality of the headset reflects upon how fast you can maneuver your scooter. You should find a service manual at mopedriders. I was traveling home this afternoon, and suddenly out of nowhere the scooter died. I give a cheap Chinese 50cc scooter a year, maybe two. 003" and . 50cc to 80cc cranks very hard. your engine should run fine with that reading. 85. 1. i decided to take the bike to chiselspeed my local scooter garage. I have a 05 Yamaha BWs/Zuma. However it did have a hard time starting, this was do to low compression. I pulled the head off and turned the flywheel to manually find my top dead center of the piston is different than that of the flywheel mark. Rolling Wrench in Denver Colorado will show you how to install and upgrade your clutch and variator to gain performance on your performance scooter. So last weekend I tore it down to find the cause of low compression. Should be able to hit the 250+ MPG mark 3) I would put money on it that you could get 5 HP out of a small 50cc diesel. A. Thses scooter performance parts are a must with a 70cc big bore kit for ultimate speed and performance. Page 43 12. It has 2 strokes need compression to start and run. It was introduced for 2008 as a replacement for the Rattler 50. I think it was overfull of oil but I have fixed that. These engine have been pretty much the mainstay of Italian Should i need to pay for a cylinder hone or is that a box of beers job? What compression would i expect to see on the guage, if my rings and piston werent worn . My suggestions are pretty simple, seeing as it's only 50cc's and that's small. Nov 28, 2012 · Why perform a compression test? A compression test can quickly determine if the engine can generate adequate pressure needed for combustion . It doesn't take much to get caught with an illegal scooter. As a matter of fact the scooter provides a solid place to hold the engine while you work. May 19, 2008 · 1) Have a lot of TQ without having to rev the snot out of them 2) Great MPG. All new engines need a initial run-in time. Compression Big Bore Kit GY6 50cc to 80cc Scooter Moped 139 QMB 139QMB Cylinder Piston Rings Get the item you ordered or get your money back. so i have placed another switch to connect en shortcut the poles of the starter relays to be able to ride the scooter, it is a jmstar sunny You will have a lower corrected c/r on a piped race engine (higher exhaust port) as the pipe will pack the charge back in while still having a higher uncorrected c/r (smaller chamber) than a stock saw, even though the stock saw will show a higher comp gauge pressure. The service manual I have suggest . Compression System. During the initial run-in, please avoid full-open throttle and don't start it over 80 percent of the top speed. drum rant but suffice it to say there is no reason for any manufacturer to use a front drum brake on any scooter. Scooter tires come in all sizes of course, with a typical 13" wheel scooter tire having a designation something like "130/60-13". If the compression got much better you should change the piston rings. 95 is definitely not the bargain it seems when bolts are stripped and parts are damaged. – Detailed 2018 Honda Ruckus 50cc Scooter Review / Buyer’s Guide: Features, Price, Colors, Engine & Frame, Pictures + More! | NPS50J – It’s time to jump in on the 2018 Honda Ruckus and go over all of the nitty-gritty details behind this 50cc scooter. Please improve this 40. I love my 50cc Kymco scooter for running around town, but it's almost embarrassingly slow to climb even moderate hills here in the flatlands of the Twin Cities. Technical Guide for Keeway 50cc Carburetors Keeway America uses two primary forms of carburetors. The Minarelli engine is a well designed air cooled, 50cc 2-stroke that is reliable and quite peppy. Mar 03, 2020 · I have fuel and fire but no compression on my 2013 yamaha vino it has everything replaced on it and it will not start please help me. The 50cc market is loaded with models from both camps, whereas the 80cc, 110cc and 125cc markets are quite a bit more limited in this regard. However the last couple scooter issues have REALLY shaken my confidence in my  Many problems can cause low compression in your scooter's motor. 500 miles. Aug 26, 2014 · The brake horsepower (BHP) of the average 50cc scooter engine is about 3 to 4. Installation of larger or smaller (even stock replacement) kits should be very similar. you need compression , but you If you don't have a compression gauge handy, all is not lost. the engine doesn't build good compression, so when kicked, the engine time running on its side) and should necessitate further investigation. IMO its pretty much pointless , I you cant tell from pulling over a saw and the way it runs if it has good compression, you should get an electric saw and then you dont have to worry. 004" have worked well for me on both 50cc and 150cc GY6 engines. I see these things come in all the time with the exhaust systems clogged up with the carbon produced by the 2 stroke oil. It's the 50cc's that tend to have a short life. Jun 02, 2011 · 3 weeks ago my scooter stopped working and would not start i cleaned the spark plug and put a new cap on i got the bike going but when i reved it it would cut out or if i just left the bike it would eventually die. I agree with Nickssticks that a compression check should be preformed and you can go from there. The Zip Cat was a variation of the Zip 2000 with basically the same features and styling. how much compression should a 50cc scooter have

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