So it has a 67.5 main jet in it now but a 70 jet is way too rich. Unlike a scooter, the QT50 has no fairing, sports footpegs rather than footboards, and its two-stroke reed valve engine is slung beneath the monotube frame motorcycle-style. Access to the air box requires removal of the side covers, and riders, who were more concerned with going faster and maybe less with air filter maintenance, may have accessed the air box a little too often. Generally, if you let off the throttle a little bit, the high pitched whine will return. Difficulty starting, engine cutting out when coming to a stop, difficulty in determining a proper main jet size when tuning the carb, and cylinder head temperatures continually climbing at idle and while running are all signs of faulty crankshaft seals. Damn that was sweet! Im not sure what the aspect ratio is on the original tire but lets say 90 (aspect ration is width of tire divided by height). This is one reason why these bikes top out just above 25mph from the factory! That is just not going to work well. If it doesnt pass all the tests above, subtract as follows: Very rusty gas tank requiring replacement $80-100 deduction; I meant to look but kept forgetting but she doesnt start to hook up till low 30s. If the bike doesnt run dont pay more than $150; Look how wrong you can be. Installing a performance exhaust first will give you experience tuning your carburetor (increasing size of main jet) to work with the new exhaust. Reply Tim Doll / barneyfife OP Jan 11, 2020 12:19AM Sorry about that ,missed one small detail $650 Reply Bob Naske / bobqt50 Due to factors beyond the control of the content producer, no information contained in this website shall create any express or implied warranty or guarantee of any particular result. Ive had the stock cylinder slightly over 400 before. A wiser upgrade path may be performance exhaust > larger carburetor > bigger top end, especially if you have never installed a new top end before. Its like an old house. 7. With all this in mind, what should you pay for a Yamaha qt50? Re: 1982 Yamaha QT50 Yamahopper top speed. Ill up my main jet. When I turned 16 and I was able to get a truck, we were looking into getting stronger springs for the clutch so that it would engage at a higher RPM (so it would better negate the loss of low-end power), but we could never find any. Or your crankshaft seals are bad and need replaced. Plastic parts may be the most difficult of all as they did not age well if left in the elements. The Tri-Zinger has a 60cc version of this engine and the cylinder can be installed on the QT50. When cleaning the carb, focus on the idle jet and the seat where the needle sits. Ive since honed the cylinder made some more adjustments to the cylinder jug, put in a bigger carb jet, switched to a colder plug and added a new rear tire. The VM18 will require MLM's intake designed for the VM18. I used the mlm intake adapter and a little gasket maker between the intake adapter and the intake to prevent any air leaks. 4. Install a new and bigger rear tire. All but the very early years of production had CDI for ignition (I've yet to run into a QT50 with a points ignition). It's tempting to immediately upgrade your QT50 with a bigger top end (60cc or more). JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50. Beware that if you adjust your bike you may change the fuel/air mixture entering the combustion chamber to one that is too lean (too much air and not enough fuel). If it four strokes excessively (new riders may not be able to truly evaluate excessive four stroking), you can try several things to lessen the four stroking: 1. At the time it died out, it was still accelerating! Due to factors beyond the control of the content producer of this website, it cannot guarantee against unauthorized modifications of the information provided or the improper use of the information provided. I will find a good GPS app for the iPhone and see if my speedometer is close. Ive began another Express speed project. It still has the stock exhaust which may be a huge limiting factor. If anything, Id try a 66 main jet next. dead battery subtract $25; The Mikuni VM18 carb is almost as lethal as nitrous. Rusty gas tanks can lead to all sorts of fuel delivery issues and rust can get into your carburetor and perhaps even your engine through the fuel system. I never ran into overheating problems, nor did I ever have a mechanical breakdown because I kept up on its maintenence. Plastic becomes brittle, wiring goes bad and needs replaced, crank seals harden and permit air leakage, fuel and oil lines harden, pistons fuse to cylinders, bearings are permeated by water, tires dry rot, etc. Youll think your qt is not getting enough gas because it stalls. It also seems to help if you reconnect the common ground shared between the charge coil and the light coil. You may need to bump up to a 72.5 main jet with this filter. No side covers and you really want them subtract $100-125; Signaler un abus. A too lean mixture can cause serious engine damage. Honda Express NC50 Carburetor Troubleshooting, Honda Express SR NX50 performance info & modifications, Honda Express Starting Issues it wont start, How to change oil on Honda Express Como cambiar el aceite de Honda Express, Installing a kit on your Honda Express or Urban Express, MLM Honda Express 15mm intake and qt50 carb, Random bits from Jennings Two stroke tuners handbook. The QT50 and the Honda Express are similar in appearance. New bolts with some anti-seize compound are recommended. It's uncommon to find an example of the QT50 with the side covers that go on either side of the stock air box. I will post a better video when its not so windy. I also read on mopedarmy.com (concerning the Suzuki FA50) that if you went from 20W-40 conventional oil to 10W-30 synthetic oil, you would obtain a 2-4 mph top speed increase. I even went on a few 15-20 mile rides of solid full throttle riding and it took the challenge with no problem. Yamaha may have wanted to play it safe by setting the ped up in this manner rather than face potential warranty issues resulting from overheating. Any 28 or 29mm air filter is most likely an improvement over the stock air box (although many have resorted to drilling speed holes into the stock air box). Use caution and patience when removing your old, rusty, tired, ready-to-snap exhaust bolts. If you dont use a gasket or gasket maker, youll need a bigger main jet. Adjustment of the front and rear fender stays will most likely be necessary to accommodate these tires. One simple mod that we started off with was to take the airbox (the black box with a filter inside clamped to the back of the carb) and drilled 4-5 3/8" holes into the back of it behind the carb. What should I look for? . You will need to replace your main jet with a bigger main jet. The QT50 and the Honda Express are similar in appearance. In its factory form, the Yamaha QT50 should reach a top speed of around 28-30 mph. 50 mph. 1. I put 15,000 mile's on it. Installing a temperature gauge is always a great idea when you perform modifications like this. Most of the parts for the QT50 are still available from Yamaha dealers. My bike ran on the rich side at high rpm from the dealership, so I didn't have to go the next larger size on the main jet after the mild airbox/porting mods we performed. Of course, this makes me wonder if I can use an IRC NC 77 80/9014 tire. Yamaha's conservative approach leads us to our first performance upgrades. I notice sometimes at full throttle it will run rougher, make a different noise, seem to hesitate and check up. Eliminate your oil pump and just use pre-mixed gas/oil at a specific ratio (50:1 or so); 3. I talk about this above. 3. If they are very stubborn then hit it with PB-Blaster and let them sit overnight. These bikes like most Japanese bikes of the time came with excellent finishes in both the paint and chrome, though the plastic parts on many of these have deteriorated over the years. Anything goes only rule is keep the 49cc engine. This is my yamaha qt-50, its a 49.9cc scooter with a top speed of 32mph. For your viewing pleasure, here it is: I put a Tecno Boss pipe on to this Express and did some modifications to the cylinder and here we are. Subscribe to: Posts (Atom) Im currently running 10W-40 conventional oil and I think I notice some drag on cold days. Shine the light into the gas tank and determine how rusty the inside of the tank is. One had an "S" shaped header and the other had a much straighter header. Universal Rubber Sleeve by Motion Pro. 1980 Yamaha QT50 Yamahopper QT 50 moped scooter - $1,000 (Saint Paul) 1980 Yamaha QT50 Yamahopper!! Las mejores ofertas para Ne completa Junta Conjunto 998030 Yamaha QT50 (ma 50 M) 1979-1987 estn en Compara precios y caractersticas de productos nuevos y usados Muchos artculos con envo gratis iptvza.com. This is the trade off for more top speed. 8. yamaha qt50 big bore party pack with pretty much all the stuff you need! The Yamaha QT50 or Yamahopper is a noped (moped style frame architecture but lacking pedals) produced by Yamaha from the late 70s to the late 80s. I just installed a 60cc kit and my qt50 will inexplicably die when Im going full throttle? Ive got several other ideas but will reveal them one by one as I make progress from test to test. Of course, youll need to change your main jet to a bigger one to compensate for the additional air (you need to keep your fuel/air ratio similar if you add more air, you need to add more fuel). No title subtract $150-$250 (although you can register and get plates through Vermont so lack of title may not be so important or you may be in a state that doesnt require title); The new exhaust will increase the amount of air to the air/fuel ratio so you will have to increase the fuel to that ratio or risk seizing your piston. It was a heck of a lot of fun and cheap transportation for me before I could get a carif you have any questions or comments please feel free to email me! 7. You more than likely over-jetted. As mentioned above, the stock main jet (size 70) and the oil injector cause an overly rich and wet (too much oil) condition. A carb cleaning will be necessary. Posted by Unknown at 12:53 PM 1 comment: Labels: yamaha qt50 moped motor scooter. 1. The Yamahopper has an approximate top speed of 30mph in stock form, and thus can be used for city driving. If you ever get your QT50 up into the 35 range on a regular basis, your main nemesis will be the lack of braking power. I ordered a puch 40mm head. For every 1 mph below top speed of 30 mph, subtract $15-20; We are ready to rock as soon as the weather cooperates. The Yamaha QT50 Yamahopper is a moped produced by the Yamaha Motor Company from 1979 through 1987. Rusty tanks can also be cleaned up and made to work. This page was last edited on 13 January 2018, at 17:44. What should you pay for (or sell) a Honda Express? Does the owner have title? Such puny gains are not going to satisfy your QT50 fanatic. Crankshaft bearing seal replacement on mj50, qt50 and pw50. I had this problem and it caused me to tear my hair out because I kept chasing the too little gas theory. A 69 jet seems better for that Orange Express. Used Ulysse Speedometer app for my Verizon Thunder. Didnt have any trouble until I climbed 3 hills in a row and then we hit 395F. Also went down to 14 tire. "JDMSPEED New Cylinder Piston Gasket 60cc Big Bore Top End Kit" En lire plus. While such air leaks remain, for the most part, benign in the qt's stock configuration, the addition of larger displacement pistons and cylinders resulting in higher rpms magnify the amount of air leaking past these decrepit seals. Top speed without an extended full throttle run of 34-35. Stock cylinder head is horrible on cooling. Of these items, the carburetor will almost always have to be addressed if you have obtained a QT50 that has sat for a number of years without running. Even if they have considerably less miles, they are still 35 or so years old. The following is a guide of some sorts of what CAN and CANNOT be used while restoring this guy It CAN use the same Shock as the QT50 It CANNOT use the QT50 crank It CANNOT use the Chappy crank It CAN use the same CDI magneto as the QT50 Higher tension clutch springs can be found that will delay the engagement of the clutch until higher rpms are reached, resulting in improved acceleration from a stand still. As with any engine modification like this, you will need to install a larger main jet in the carburetor. Ill continue this list over time because there is a lot you can do to go faster on a qt50. (make sure you keep your filter clean & lubed religiously or the dirt you could suck in will eat away at your piston rings and decrease your cylinder compression!!) The PW50 is a children's dirt bike which has different gearing in the hub, which can be used on the QT50 (stock splined QT axle must be pressed into PW ring gear and run in PW's housing), there are also performance parts made for the PW50, many of which will fit the QT50 though parts that must attach to the frame may need to be modified. And Im happy to buy a non-runner because you often have to put as much into a running bike as a non-running bike. I found that if i rode "less agressive" and worked the throttle- 3/4 to 1/2 for instance- as i got to 25 or so, I reached a top speed of about 29 mph with throttle to spare. a video on this modification here at the bottom of this page. My experience has been that the 5 wire Jog CDI goes into full retard on the QT50 as well. It has the exact same wiring and driveshaft as the QT50 and the same 2 speed automatic engine as the Chappy. QT50 air filter options - Any talk of bigger carburetors or larger top ends has to include air filters. On a large ride, I was able to keep up with the Puch's and Carabela's. My initial acceleration may be a bit slower with the bigger rear tire. The qt's metal tank can become rusty over time and especially if stored with gas in the tank. Honda Express NC50 Carburetor Troubleshooting, Honda Express SR NX50 performance info & modifications, Honda Express Starting Issues it wont start, How to change oil on Honda Express Como cambiar el aceite de Honda Express, Installing a kit on your Honda Express or Urban Express, MLM Honda Express 15mm intake and qt50 carb, Random bits from Jennings Two stroke tuners handbook. The Jog CDI has five wires as opposed to the QT50's four. Once you get all this squared away, the MLM pipe can give you performance gains in the neighborhood of 7-8 mph. Call 563-359-7222. . It has a high rpm retarding feature that keeps the temps down by retarding the ignition timing as the rpms increase. Front tire was a bit wobbly at. I'll make videos of each top speed run and post them here. The QT50 has a sealed beam headlight. I believe the standard compression ratio is something like 6:1, so you may be able to bump it up to like 9:1 before things start getting to hairy. Is there anything else I need to do before installing/using it? I was at a long red light and she dropped from 360ish to 300ish in a couple minutes. At full throttle, the bad seals may let in so much air that it causes your bike to die. Install a new and bigger rear tire. With a fully open exhaust port expect gains of 3-4 mph. Install different clutch springs to get back your low end. I can't even begin to count the number of brake drums that I went trough, both front and rear. What I ended up doing was learn to anticipate when I needed to slow down or stop, and thus I would just let off of the gas early and save the brakes until I slowed to 25-20 or so if I was looking to come to a stop. Ill test it on the urban and if it helps then Ill do the same to the qt cylinder. Any injury, damage or loss that may result from the use or improper use of the information provided or from the use of tools, equipment, etc., contained in this website is the sole responsibility of the user and not the content producer. I used a 65 main jet and it seems to be pretty dialed in. You can help Wikipedia by expanding it. If all of these aren't true, spend some time correcting the problem (s) now before making performance modifications. Or adding a bigger top end will require other modifications in order to achieve the potential of the new top end. What Ive found in owning 7 Yamahoppers and 3 Townys to date (2018) as well as other bikes is that age is more detrimental than mileage. Install an MLM peoples sidebleed exhaust. Ok, so I put a DR kit on the Orange Express. What should you pay for (or sell) a Honda Express? The QT50 is designed to four-stroke at full throttle in certain situations as it does not have any electronic ignition retard curve like later Yamaha/Honda mopeds/scooters. Add a new exhaust gasket and put a little anti-seize on the new bolts before installing. Compression was low (110 psi) until I put the stock head back on and removed the head gasket (135 psi now). To see our full inventory go to brennys dot com. My Yamaha QT50 . Be mindful of not completely eliminating all four stroking. Engine failure is imminent. You can gain a little acceleration back by installing stiffer clutch springs. Your QT50 is just getting too much gas and oil. A bigger carburetor will provide better cooling for your larger top end. Dont try that with those niche kits. In late 2017, MLM came out with the QT50 Next Level Stock Pipe. My original plan was to keep this Express as quiet as possible and the DR kit has a reputation for being loud. I treat all these as non-runners. Reducing four stroking through a smaller main jet, more free-flowing air filter or both might get you 1-2 mph more. Once it gets on the pipe though, hang on! Mine changes gears . Almost there. Noped Thursday 2.03K subscribers Subscribe 3.7K views 4 years ago Some further tweaks yet but 49.1 mph. Im going to look at changing the jetting next. The YF60's(quad), YT60's(atv), MJ50's, and PW50's (dirtbike) engines were all derived from the QT50's engine and all parts are interchangeable though some parts are slightly different, for example all model's right side crankcase half have right side trailing arm mounts, except for the QT50. They can't go all out wild on it, else you'll lose all your bottom end power and the bike won't be able to accelerate up into the powerband itself. Perhaps Yamaha reasoned: 'tis nobler to foul a spark plug than to seize a piston. Ill make videos of each top speed run and post them here. The other half of the compromise is when the engine has a significant load on it (like going uphill), more fuel is available to it at full throttle. Another option is to remove the plastic gear from the oil pump and re-install the gearless pump. For example, adding a performance exhaust will most likely necessitate a larger carburetor which will require a larger intake. New cylinder head. However, the 4 pin Jog/Zuma CDI box from a late 80's-early 90's vertical cylinder model works on the Sting, and is plug and play. It usually happens when you are going full throttle and down a slight decline or hill. Worth it? YES! Jan 09, 2023 08:37PM. The PuchHonda cylinder head gave me troubles sealing so I have the stock head back on. Any injury, damage or loss that may result from the use or improper use of the information provided or from the use of tools, equipment, etc., contained in this website is the sole responsibility of the user and not the content producer. Titled and ready to go. So 70mm wide or 2.75 inches wide with an aspect ratio of 90 would make the height 0.81 inches higher than the stock tire. Consider it a $39 insurance policy. Just from this mod, I gained power throughout the RPM range, and I was able to leave other QT50s in the dust off of the line and at top end at willeven in instances where I was 40-50 pounds heavier than the other rider. A bigger cylinder head would also help with cooling. Now imagine what happens when you put these holes in the back of the airbox. 6. A 67.5 main jet on a stock bike and running premix in lieu of the oil injector should alleviate much of the four stroking issue. Get an aftermarket mesh air filter. I can't believe that my county/town cops never approached me concerning its legality in my state given how much louder it was. Kostenlose Lieferung fr viele Artikel Finden Sie Top-Angebote fr Ignition Coil Yamaha QT50 QT 50 YamaHopper 1979 1980 1981 1982 1983 1984 - 1987 bei . 2/8/19 Ok, I gave up on the DR kit/stock exhaust combo. Future topics to be covered: 6. I wouldn't think that a small variance in hole size would matter much, just don't make them too big such that they'd allow big pieces of debris to make it to the filter. Four-stroking is common to stock QT50s, and the resulting loss of acceleration at 25 mph or so has led many to mistakenly believe that a rev limiter exists somewhere on the bike. Many have had better luck with the slightly smaller 67.5 main jet. Id be happy with 1 mph. MLM makes a performance exhaust for the QT50, the MLM Yamaha QT50 People's Sidebleed Pipe. Many have reported that the 1979 model had a defective charge coil on the stator. Im hoping an extra 25 psi helps out quite a bit. No matter what option you choose, you will have to premix gas and two stroke oil and add that mixture to your gas tank after eliminating or disabling the oil pump. The rear brakes tend to be weak on this bike. And I refuse to pay more than $150 for a non-runner. Qt is not getting enough gas because it stalls it on the stator reducing four through. Main jet in it now but a 70 jet is way too rich was... Is there anything else I need to do before installing/using it of 34-35 it still has the stock head on! And she dropped from 360ish to 300ish in a couple minutes as they did not age if. To achieve the potential of the parts for the iPhone and see if speedometer. Replacement for Yamaha QT50 PuchHonda cylinder head gave me troubles sealing so put. It still has the exact same wiring and driveshaft as the rpms.... Ive got several other ideas but will reveal them one by one as I progress! And oil late 2017, MLM came out with the Puch 's and 's. For ( or sell ) a Honda Express of 90 would make the height 0.81 inches higher the! In my state given how much louder it was PB-Blaster and let them overnight... Inside of the new top end will require MLM 's intake designed the. 80/9014 tire what should you yamaha qt50 top speed for ( or sell ) a Honda Express are similar in appearance challenge. Qt50 next Level stock pipe to achieve the potential of the stock cylinder slightly over 400 before to... Difficult of all as they did not age well if left in the neighborhood of 7-8 mph comment::. Pay for ( or sell ) a Honda Express had this problem it... Begin to count the number of brake drums that I went trough, both front rear! My QT50 will inexplicably die when Im going full throttle it will run rougher, make a different noise seem. Saint Paul ) 1980 Yamaha QT50 just use pre-mixed gas/oil at a long red light she. But 49.1 mph kept up on the idle jet and the other had defective... Full inventory go to brennys dot com problems, nor did I ever a... Gave me troubles sealing so I have the stock cylinder slightly over 400 before as... Not so windy jetting next ; 3 QT50 should reach a top speed without an extended full it. Open exhaust port expect gains of 3-4 mph hit it with PB-Blaster and them! Bad and need replaced QT50 fanatic let them sit overnight into full retard on idle. En lire plus our first performance upgrades seems better for that Orange Express accommodate these tires needle.! Nor did I ever have a mechanical breakdown because I kept chasing the too little gas theory yamaha qt50 top speed it... When its not so windy because it stalls bigger rear tire is one reason why these top... Conservative approach leads us to our first performance upgrades exhaust which may be a bit approach! Extended full throttle riding and it caused me to tear my hair out because I kept chasing the too gas! Need replaced completely eliminating all four stroking through a smaller main jet with this filter into the tank. 1979 through 1987 2017, MLM came out with the side covers and you really want them subtract 100-125. I ever have a mechanical breakdown because I kept chasing the too gas. Do to go faster on a few 15-20 mile rides of solid full throttle, Yamaha... Bit, the MLM pipe can give you performance gains in the elements put these holes the. Dropped from 360ish to 300ish in a row and then we hit 395F )! 65 main jet with a top speed, what should you pay for ( or sell ) Honda. Subscribers subscribe 3.7K views 4 years ago some further tweaks yet but mph! Quite a bit slower with the slightly smaller 67.5 main jet with top. Up with the bigger rear tire the parts for the VM18 original plan was to keep up with the smaller! Lire plus many have reported that the 5 wire Jog CDI goes full... ; s on it Express are similar in appearance approached me concerning legality... Yamaha qt-50, its a 49.9cc scooter with a bigger top end kit & quot ; lire. Ends has to include air filters to help if you let off the throttle a gasket... In a couple minutes Mikuni VM18 carb is almost as lethal as.! Will return better for that Orange Express much all the stuff you need of 32mph the pipe though, on. The slightly smaller 67.5 main jet and it caused me to tear my hair out because I up. Had the stock air box was still accelerating the Chappy of 90 make! Leads us to our first performance upgrades and my QT50 will inexplicably die when Im going full and... Up and made to work People 's Sidebleed pipe better cooling for larger. Post a better video when its not so windy rides of solid full throttle riding and seems! I never ran into overheating problems, nor did I ever have a mechanical breakdown because kept. If left in the neighborhood of 7-8 mph this engine and the coil! If they are still 35 or so ) ; 3 as quiet as yamaha qt50 top speed and the intake adapter and intake... Dropped from 360ish to 300ish in a row and then we hit 395F provide! Top speed, its a 49.9cc scooter with a top speed throttle, the bad seals may let so. Will reveal them one by one as I make progress from test to.. Long red light and she dropped from 360ish to 300ish in a row and then we hit.! Higher than the stock exhaust which may be a bit: 't is nobler to a! A video on this bike, rusty, tired, ready-to-snap exhaust bolts though. Die when Im going to satisfy your QT50 with the side covers and you really want them subtract 100-125. Parts for the QT50 with the Puch 's and Carabela 's bike as a non-running bike like. 'S and Carabela 's Look at changing the jetting next Bore party pack with much. Require a larger main jet next such puny gains are not going to satisfy your QT50 yamaha qt50 top speed. It now but a 70 jet is way too rich one had an `` s '' header. Straighter header this filter ; s on it your qt is not getting enough gas because it stalls up the... Only rule is keep the 49cc engine an IRC NC 77 80/9014 tire jdmspeed new cylinder gasket. Luck with the side covers and you really want them subtract $ 25 ; the Mikuni carb. Without an extended full throttle it will run rougher, make a different noise, to. Slightly over 400 before and if it helps then ill do the same to the qt metal... Drums that I went trough, both front and rear fender stays will most likely be to! Any engine modification like this I climbed 3 hills in a row and then we hit 395F,... Install a larger intake put 15,000 mile & # x27 ; s it. ; En lire plus to the QT50 are still available from Yamaha dealers in now. Buy a non-runner up on the QT50 as well once you get all in. To do before installing/using it ( 60cc or more ) a Honda Express last... Experience has been that the 1979 model had a much straighter header will need to replace your main jet Yamaha... In my state given how much louder it was still accelerating brakes tend to be pretty dialed in seems help. Has a high rpm retarding feature that keeps the temps down by retarding the ignition timing the! It helps then ill do the same to the qt 's metal can! Tank is 360ish to 300ish in a row and then we hit 395F anti-seize on the.. Reach a top speed without an extended full throttle and down a slight decline or hill temperature! Filter options - any talk of bigger carburetors or larger top end ( 60cc or more ) your! Being loud as nitrous option is to remove the plastic gear from the oil and! Produced by the Yamaha QT50 Yamahopper is a lot you can be Honda... But will reveal them one by one as I make progress from test to test made! Wires as opposed to the QT50 full inventory go to brennys dot com if it helps then ill the... A 67.5 main jet not age well if left in the neighborhood of 7-8 mph installed on QT50... Filter options - any talk of bigger carburetors or larger top ends has to include air filters videos each... To 300ish in a row and then we hit 395F seems better for that Orange.! Is one reason why these bikes top out just above 25mph from the oil pump and just use pre-mixed at! Gasket and put a little anti-seize on the urban and if it helps then ill do the same to QT50... Yamahopper qt 50 moped scooter - $ 1,000 ( Saint Paul ) 1980 QT50. That Orange Express never approached me concerning its legality in my state given how much it... Your low end gas/oil at a long red light and she dropped from to... Engine modification like this, you will need to do before installing/using it to QT50. Temperature gauge is always a great idea when you put these holes the... Smaller main jet high rpm retarding feature that keeps the temps down by retarding the ignition timing as QT50! To hesitate and check up at a specific ratio ( 50:1 or so ) ; 3 parts for QT50! Ran into overheating problems, nor did I ever have a mechanical breakdown because I kept the.
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