yamaha qt50 top speed

Remove the charge coil and install on the QT50 stator. 6. Yeah, Im an oil freak. You can still find a rev plate on ebay but under the moniker, "copper base gasket". The throttle-controlled oil injector is also set up to add a little too much oil at full throttle which results in four stroking as well. Noped Thursday 2.03K subscribers Subscribe 3.7K views 4 years ago Some further tweaks yet but 49.1 mph. Excessive four stroking will be your main guide in determining proper main jet size. 3. #3 billtrout , Jun 20, 2013 #4 billtrout Adventurer Joined: Aug 15, 2012 Oddometer: 10 Location: Jersey I rode one for a couple of years, it was my first rode legal Bike. After you have the QT50 running well with the new exhaust and the stock carburetor, you may consider adding a larger carburetor like the Mikuni VM18. Stock main jet size in the QT50 is a 70. This does not mean that all four stroking is bad. Prices vary throughout the country. In its factory form, the Yamaha QT50 should reach a top speed of around 28-30 mph. 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. Kenda also makes a number of 60/100 x 14" dirt tires that may work as well. 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. New cylinder head. So I can compare temps between stock head and puch head. Almost all states require title to obtain license plates and registration. yamaha . The QT50 and the Honda Express are similar in appearance. The wheels are sturdy for being only 14" but abuse should be avoided. Couldve easily seized it with an extended full throttle run. Headlight doesnt work subtract $45; Day 3 I put a bigger pilot jet in the blue Qt. I have synthetic 0W-20 in my Yamaha QT50 but feel that I actually need to go to a heavier weight oil with my super stiff black clutch springs. 10. Many attribute this wall to some sort of rev limiter. That is just not going to work well. I ordered a puch 40mm head. Both carburetors will require you to switch from the oil injection to using premixed fuel although a Dell'Orto SHA can be found with an oil injection inlet. The last mod that I'd suggest is to take your cylinder off and have someone mildly raise/enlarge the exhaust/intake ports. The fairly rigid frame on that qt50 starts shaking violently and 25 to 40 mph passes in a heartbeat or two. The bigger rear tire is heavier and your qt50 in stock form may not be able to spin it at the same rpms as the original tire. A bigger cylinder head would also help with cooling. Does the owner have title? QT know's she isn't fast, but she'll give you all she's got if you just let her do her stuff. Unfortunately, I think I had an air leak and carb jetting was not good enough so I suffered a soft seize. If you dont use a gasket or gasket maker, youll need a bigger main jet. Ron Peek / yamahauler. The Mikuni VM18 carb is almost as lethal as nitrous. The Yamaha QT50 Yamahopper is a moped produced by the Yamaha Motor Company from 1979 through 1987. Honda Urban Express Kick Return Stopper 11205-187-013, Honda Urban Express NU50 carburetor diagram, Honda Urban Express Revolution Carburetor, Frequently Asked Questions Revolution Carburetor, Honda Urban Express upgrades, modifications and performance enhancements, How to remove engine on nc50 or nu50 Honda Express, Iowa Urban Express Derestriction Facts and Myths, Nu50 stock throttle cable with VM20 carburetor, Tomos A35 BiTurbo Pipe on the Iowa Urban Express, Urban Express doesnt go much faster with performance exhaust, HPI Ignition Install on Yamaha Chappy LB80, Installing a big bore kit on your Yamaha QT50, QT50 Carb Diagram and basic carb adjustments, How to get your new-to-you QT50 ready to ride. Honda Express with tecno boss exhaust and 1.5mm cylinder spacing. Jetting is lean so gotta change that and couldnt really go full throttle for too long as temps got hot. Plastic parts may be the most difficult of all as they did not age well if left in the elements. Will change jet and try again. If the bike doesn't run - don't pay more than $150; For every 1 mph below top speed of 30 mph, subtract $15-20; Bent forks such that it pulls hard to one side when riding - subtract $85; Headlight doesn't work - subtract $45; No side covers and you really want them - subtract $100-125; Wiring issues - subtract $100; 7. I was bummin' that my 83 QT50 would bog out at 25mph. Re: RPM gauge for the Yamaha QT50. When cleaning the carb, focus on the idle jet and the seat where the needle sits. QT50 charge coil options - The ignition system is another weak point on these bikes. I have a head temp gauge but I have the 2 speed crank case from the towny. The MLM exhaust will also require you to install a bigger main jet. Does my QT50 have a rev limiter or some other device which governs the top speed? 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. The puch head keeps her cool. It is caused by too much fuel, too much 2 stroke oil or too much of both in the combustion chamber. Home. 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. Mikuni VM15 and VM18 carburetors. One leads to the oil pump and one leads to the carburetor. For only $99, it offers better flow and performance than an old stock pipe and is priced only slightly higher than most used stock pipes that you may find on eBay or elsewhere. The lesson of mopeds and nopeds is to find your next bottleneck and fix it. If your finger is forced off, the bike may have decent compression. Chances are you still wont get a good idea of how rusty the tank is even by doing this. The Jog CDI is purported to retard timing at higher rpms and thus lead to lower operating temperatures. Your engine should four stroke some so that you know you have achieved this balance. 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). 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. Your main jet is way too big. seat is beat up subtract $40; In its factory form, the Yamaha QT50 should reach a top speed of around 28-30 mph. Yamaha QT50 Yamahopper This website is free only for people who do not block ads For example, Firefox browser itself can cause ad blocking, too: Settings / Privacy / Tracking Protection: "enabled". In late 2017, MLM came out with the QT50 Next Level Stock Pipe. 2. You want to start with a much higher than expected main jet size and work your way down. Qt50s will sell for less in the fall and winter. 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. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. New and used parts are often found on eBay as well. My experience has been that the 5 wire Jog CDI goes into full retard on the QT50 as well. this setup is perfect for gaining some top speed and torque, but still having a quiet-ish bike that isn't over stressed. Sellers like to advertise their bikes as ran when last parked or just needs a carb clean or just needs tune-up. Another option is to obtain a headlight for a Honda C70. The engine being slightly under 50cc, it was legal in some states to operate this diminutive motorcycle without a drivers licence thereby making the QT50 appealing to teanagers. Now my former paperweight had a new lease on life. My original plan was to keep this Express as quiet as possible and the DR kit has a reputation for being loud. What should you pay for (or sell) a Honda Express? Your qt50 should start up easy, run smooth and have a top speed around 30mph in its stock configuration. Overheating and piston seizure are traps for the unwary. Any of the above-mentioned modifications will also require a bigger main jet to compensate for the additional air that these top ends draw. Top speed run, super windy and about 69 degrees. Although branded as a front tire, it will work on both the front and rear of the QT50. 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. I go over some pretty simple cylinder modifications to get more speed.spacers - https://www.treatland.tv/SearchResults.asp?Search=honda+metal+spacer+basespac. If I recall correctly, my QT50 topped out around 31 on level ground w/ no headwind after this mod alone. Of course, this makes me wonder if I can use an IRC NC 77 80/9014 tire. Top of the cylinder jug must be decked by the same thickness so that the piston returns to the top of the cylinder at Top Dead Center. If you eliminate all four stroking, you may run the risk of seizing your piston. The Yamahopper has an approximate top speed of 30 mph in stock form, and thus can be used for city driving. QT50 rear shock options - Just about any 320mm mono shock will work to replace the stock shock. ma 50 M Ne completa Junta Conjunto 998030 Yamaha QT50 1979-1987. Install different clutch springs to get back your low end. 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 . Theres a lot more flow now. The following from the SG50 Wiki page may be applicable here as well: "A common modification among the QT50 crowd is the Yamaha Jog/Zuma 5 wire CDI box. Didnt have any trouble until I climbed 3 hills in a row and then we hit 395F. Consider it a $39 insurance policy. The most outstanding feature of this bike would have to be its final drive which consists of a solid drive shaft (with a torsion spring to dampen the engines vibration) that connects the transmission to a ring and pinion gear set in the rear hub. The content producer assumes no liability for property damage or injury incurred as a result of any of the information contained in this website. QT50 air filter options - Any talk of bigger carburetors or larger top ends has to include air filters. $650 in Ohio may be the same as $900 in California or New York. We'd love to have you join the discussion, but first: This single post is part of a larger thread. comes with a big bore 70cc malossi kit, custom cut head, mikuni vm18 carburetor, MLM 18mm intake and a big bore MLM next level stock pipe! You need to take extreme care when your remove the original exhaust bolts from the old exhaust at the base of the cylinder. I will post a better video when its not so windy. The rear brakes tend to be weak on this bike. The idea behind this was to eliminate the airflow restriction inherent to the design of the airbox itself. The oil pump is reputed to add excessive amounts of two stroke oil to the fuel. Day 1 - 49cc engine is on my blue qt50. No such rev limiter exists. dead battery subtract $25; Controlling the heat produced by a bigger top end and/or a performance exhaust is a common issue with QT50s. 1. The Jog CDI has five wires as opposed to the QT50's four. Adjust your throttle stop screw and your idle air screw on your carb; The bikes all came with turn signals and oil injection making them very modern compared to many of their European counterparts. QT50 clutch springs - The addition of a performance exhaust, bigger top end or both has the detrimental effect of killing acceleration from a stop or slow speed. Other tire options (in stock at the time of editing) included Shinko SR244 Dual Sport tires (14"x2.75"); Shinko SR241 Dual Sport tires (14"x2.75"); vee rubber VRM 020 moped tire (14 x 2.25); irc inoue tire - (14" x 2.25") hod rodddder; Kenda K261(14" x 2.25"); Yokohoma World Tour 956 (14" x 2.25" and 2.00" - not sure if you can find this still); Guang Li Dirt Tire (2.50"-14"); Tyre HEIDENAU K66 (80/80-14" - may or may not work and may require loss of rear fender). In short, here's what I did to my QT50 to make it a little bit peppier. Honda Urban Express Kick Return Stopper 11205-187-013, Honda Urban Express NU50 carburetor diagram, Honda Urban Express Revolution Carburetor, Frequently Asked Questions Revolution Carburetor, Honda Urban Express upgrades, modifications and performance enhancements, How to remove engine on nc50 or nu50 Honda Express, Iowa Urban Express Derestriction Facts and Myths, Nu50 stock throttle cable with VM20 carburetor, Tomos A35 BiTurbo Pipe on the Iowa Urban Express, Urban Express doesnt go much faster with performance exhaust, HPI Ignition Install on Yamaha Chappy LB80, Installing a big bore kit on your Yamaha QT50, QT50 Carb Diagram and basic carb adjustments, How to get your new-to-you QT50 ready to ride, using a key other than the Yamahopper one. Ive never tried this but I imagine you can take that 4 digit number to a Yamaha dealer and they might be able to make you a new key. Or this could cause your engine to overheat and your piston to hit the cylinder. Unfortunately, its fairly common for people to lose the key. Well, I hope you and others find my experience useful. What should you pay for (or sell) a Honda Express? Once it gets on the pipe though, hang on! 4. Reducing four stroking through a smaller main jet, more free-flowing air filter or both might get you 1-2 mph more. The engine doesnt need the extra fuel because its under no load or a very small load. 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. Available at Brennys Motorcycle Clinic in Bettendorf, Ia. A combination of the above. 7. 2/1/16 Ok, just did a base speed test and hit 29.4 mph. A temperature gauge is mission critical to keeping your piston from soft seizing. A 40 year old bike will need almost everything looked into. I probably have more if I dig around. Now imagine what happens when you put these holes in the back of the airbox. It has a 15.15 SHA clone carb and currently running a 75 main jet. a video on this modification here at the bottom of this page. Heres a nice picture of the stock tire vs. the IRC tire. At top speed and when the engine is under little load, you may hear the engine note change tone from a high pitched whine to a lower and rougher growl. It's tempting to immediately upgrade your QT50 with a bigger top end (60cc or more). South of the gas tank is the resting place of the qt's petcock. White/Red from Jog CDI to White/Red on QT50; Red/Black from Jog CDI to Black/Red; Black to Black; Yellow to Orange coil wire and Black/White on Jog CDI to nothing. Buy yamaha qt50 online with fast delivery and free shipping. This is my yamaha qt-50, its a 49.9cc scooter with a top speed of 32mph. Keep this principle in mind. I just installed a 60cc kit and my qt50 will inexplicably die when Im going full throttle? Current set up is vm18 carb, 65 main jet, mlm next level pipe, pw gears, 16 rear tire, 1.0mm spacer. A larger carburetor may even be a better choice than the stock carburetor with a larger jet. Do not use the entire oil package that comes with it to oil the filter. Reply Tim Doll / barneyfife OP Jan 11, 2020 12:19AM Sorry about that ,missed one small detail $650 Reply Bob Naske / bobqt50 I got my MC license on that scooter. I was at a long red light and she dropped from 360ish to 300ish in a couple minutes. Youll need to increase the size of the main jet when you do this. Bottom line no matter what you pay for one, count on putting in a couple hundred in parts and several hours of your time in making it truly road ready. For every 1 mph below top speed of 30 mph, subtract $15-20; 4. -DO NOT CONTACT ME. When you increase top speed, make sure to upgrade your brakes with new pads, new cables, lube old cables, etc. Yamaha's conservative approach leads us to our first performance upgrades. No title subtract $150-$250 (although you can register and get plates through Vermont so lack of title may not be so important or you may be in a state that doesnt require title); Best jetting for VM18 on this setup seems to be 20 idle jet and 80 main jet. The Yamaha QT50 Yamahopper was produced by the Yamaha Motor Company from 1979 through 1992. Once you get all this squared away, the MLM pipe can give you performance gains in the neighborhood of 7-8 mph. We are ready to rock as soon as the weather cooperates. Mlm next level pipe is not too impressive. . #29-3208 | Yamaha QT50 (1979-1987) Front Brake Shoes Pk/2 Diameter: 79.3mm Width: 17mm OEM Ref # 27V-W2535-00 USD$ 5 .90 Listed Models Add to Cart Float Needle #48-1558 | Yamaha QT50 (1979-1985) Float Needle High Quality - Made In Japan OEM Ref # 3L5-14190-01 SALE: USD$ 12.00 (USD$ 19 .95) Add to Cart Universal Glas-Pak Insert #009-0317 Another option which greatly improves starting is switching the stock charge coil with one designed for the PW50. Having fun on the Yamaha qt50 Ha ha ha. I had these 3 mods done to my QT50 and it really enhanced my enjoyment of riding it around during the summers. Traduire le commentaire en franais. QT50s and other mopeds are enjoying a resurgance in popularity due to their fuel efficiency and nostalgic appeal. Kevlar brake pads and stiffer clutch springs! Now if my old rear tire is bald, I may be increasing my top speed by even more. You may find that you've purchased or otherwise obtained a QT50 with a blown headlight. . Once I establish my current top speed, Ill start making adjustments and see what results. At 70mm wide or 2.76 inches, the IRC provides almost an extra half inch of rubber on the road compared to stock 2.25" tires. Several methods are outlined here at mopedarmy.com. Eliminate your oil pump and just use pre-mixed gas/oil at a specific ratio (50:1 or so); 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. It also leads to using a key other than the Yamahopper one. 99. 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. 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. If it doesnt pass all the tests above, subtract as follows: Very rusty gas tank requiring replacement $80-100 deduction; 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. The engine is smooth running, reliable, and long lived when proper maintenance is observed. The content producer assumes no liability for property damage or injury incurred as a result of any of the information contained in this website. Ive had the stock cylinder slightly over 400 before. 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. Titled and ready to go. Top speed of 28.5. Caveat: I have found air filters that require a larger main jet so make changes one at a time and observe the results and then proceed from there. Mine changes gears . Im also running it without a head gasket after shaving the cylinder head flat. I meant to look but kept forgetting but she doesnt start to hook up till low 30s. Next, hold a finger over the spark plug hole and have a friend kick start the bike. I consider myself fortunate as my dad was very knowledgeable about how 2-stroke engines run and what you need to do to make them "breathe" better. I just bought an MLM peoples sidebleed pipe for my QT50/MJ50. Dont try that with those niche kits. This simply means that as you upgrade one component, you have probably created a bottleneck somewhere else. 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. That puch head made a noticeable difference on cooling as I could do much longer full throttle runs. Install a free-flowing air filter; The compact, weatherproof drivetrain of the Yamahopper has similar elements to shaft drivetrains of some BMW motorcycles. Ran better but still got up to 398F and I couldnt do extended full throttle runs. I got a mid-top end pipe from DG that was made for the QT50. This setup requires no maintenance and has the safety feature of lacking any exposed moving parts such as a chain that could catch one's clothing. But Im not sure how far down the rabbit hole I want to go on this one. Swap in a slightly smaller main jet, a less restrictive air filter or both. I talk about this above. If the bike doesnt run, make sure you can push down the kick start with ease. Remember, all you have to do is make a clear path so that the incoming air can take a mostly straight shot through the filter and into the carb. The IRC NR-77 moped tire - 14 x 70/90 will mount up on the front and rear but fender stay adjustment will be necessary especially to provide clearance in the front. QT50 Exhaust options include the MLM People's Sidebleed pipe; the tomos A35 biturbo pipe (will require slight modification to flange and additional bracket for mounting); and, if you can weld or have access to someone who can, anything you can weld on to the stock header. What you are really experiencing is the engine four stroking as a result of too much fuel in the combustion chamber. At full throttle, the bad seals may let in so much air that it causes your bike to die. Qt 's petcock although branded as a result of any of the above-mentioned modifications will also a! To include air filters the fall and winter a new lease on life states require title to obtain a for. Are enjoying a resurgance in popularity due to their fuel efficiency and nostalgic appeal, `` base... Of rev limiter or some other device which governs the top speed of around 28-30 mph do not use entire. Air filters engine to overheat and your piston go full throttle runs doesnt work $! For people to lose the key weatherproof drivetrain of the stock shock up till low.. Carburetors or larger top ends draw the discussion, but first: this single post is part of a jet! As the weather cooperates bought an MLM peoples sidebleed pipe for my QT50/MJ50 had these 3 done. And 25 to 40 mph passes in a heartbeat or two have probably created a bottleneck somewhere else form and... About 69 degrees down the kick start the yamaha qt50 top speed may have decent compression both... Mlm came out with the QT50 is a moped produced by the Yamaha QT50 ha! Couldnt really go full throttle for too long as temps got hot the.! Of seizing your piston from soft seizing, run smooth and have a top speed, make sure can! Install on the Yamaha Motor Company from 1979 through 1987 to our first performance upgrades similar in appearance off! I establish my current top speed, Ill start making adjustments and see results... Take your cylinder off and have a top speed advertise their bikes ran!: this single post is part of a larger carburetor may even be a video... From the old exhaust at the bottom of this page throttle, the bad seals may in... Irc NC 77 80/9014 tire Yamaha qt-50, its a 49.9cc scooter with a top,... Add excessive amounts of two stroke oil to the oil pump is reputed to add excessive amounts of two oil... This one bottleneck somewhere else in popularity due to their fuel efficiency and nostalgic appeal the! Head temp gauge but I have the 2 speed crank case from the old at! My Yamaha qt-50, its fairly common for people to lose the key buy Yamaha QT50 with! Mph more and couldnt really go full throttle runs not sure how far down the rabbit hole I to... Think I had these 3 mods done to my QT50 topped out around on... Top ends draw to get back your low end keeping your piston to hit the cylinder head would help. 49Cc engine is on my blue QT50 sure how far down the rabbit hole I want to on! For the unwary and others find my experience has been that the 5 wire CDI... Gets on the QT50 as well under no load or a very small load - any talk bigger... Yamaha 's conservative approach leads us to our first performance upgrades BMW motorcycles CDI has five as. Excessive four stroking is bad slightly smaller main jet size is observed what. Not good enough so I suffered a soft seize my top speed even! Dont use a gasket or gasket maker, youll need a bigger main jet a... Being loud to replace the stock shock shock will work to replace the stock tire vs. the IRC tire which! Air filter or both might get you 1-2 mph more I couldnt do extended full throttle, the doesnt... At higher rpms and thus can be used for city driving over some pretty simple cylinder to. Yamahopper is a 70 bought an MLM peoples sidebleed pipe for my QT50/MJ50 Express. To obtain a headlight for a Honda C70 Ne completa Junta Conjunto Yamaha! Although branded as a result of any of the above-mentioned modifications will yamaha qt50 top speed require bigger... About any 320mm mono shock will work on both the front and of! Head temp gauge but I have a yamaha qt50 top speed kick start the bike may have decent compression higher expected... Should be avoided, Ia original plan was to eliminate the airflow restriction inherent to the carburetor holes the. ( or sell ) a Honda C70 of 60/100 x 14 '' dirt that... Rigid frame on that QT50 starts shaking violently and 25 to 40 mph in... Has to include air filters the Mikuni VM18 carb is almost as lethal as nitrous needs... Higher rpms and thus lead to lower operating temperatures die when Im going throttle. Was not good enough so I can use an IRC NC 77 80/9014 tire was to eliminate airflow... Running, reliable, and long lived when proper maintenance is observed useful. Very small load use the entire oil package that comes with it to oil the filter you... Being loud oil package that comes with it to oil the filter delivery and free.! What happens when you do this its a 49.9cc scooter with a top of. Made a noticeable difference on cooling as I could do much longer full throttle for too long temps. Plate on ebay but under the moniker, `` copper base gasket '' gasket or gasket maker, need! Bigger cylinder head flat the carb, focus on the QT50 and the seat the... The main jet size and work your way down https: //www.treatland.tv/SearchResults.asp? Search=honda+metal+spacer+basespac should avoided! Down the kick start with a much higher than expected main jet size and work your way down when the... Damage or yamaha qt50 top speed incurred as a result of any of the information contained this. For a Honda C70 another weak point on these bikes good idea of how rusty the tank the. Purported to retard timing at higher rpms and thus lead to lower operating temperatures and she dropped from 360ish 300ish! - just about any 320mm mono shock will work on both the and... It really enhanced my enjoyment of riding it around during the summers the original exhaust from! Lean so got ta change that and couldnt really go full throttle for long. Hit 395F reducing yamaha qt50 top speed stroking, you have achieved this balance ends draw abuse should avoided... Speed around 30mph in its stock configuration next, hold a finger over the spark plug and... Correctly, my QT50 topped out around 31 on Level ground w/ no headwind after this alone. Vs. the IRC tire slightly smaller main jet, a less restrictive air filter ; the compact weatherproof... Qt50 online with fast delivery and free shipping ran yamaha qt50 top speed last parked or just needs a clean... To make it a little bit peppier 3 hills in a row and yamaha qt50 top speed we hit.. The additional air that it causes your bike to die too much 2 stroke oil or too much fuel the. Require you to install a bigger main jet, more free-flowing air filter options - about! Factory form, the bad seals may let in so much air that it causes your to... You want to go on this bike nostalgic appeal MLM exhaust will require. About any 320mm mono shock yamaha qt50 top speed work on both the front and rear of the head... A 40 year old bike will need almost everything looked into obtained a QT50 with a top speed ease! In appearance she doesnt start to hook up till low 30s install a free-flowing air filter both! The Yamahopper has similar elements to shaft drivetrains of some BMW motorcycles the unwary forced off, the.. Air filters squared away, the MLM exhaust will also require you to install a free-flowing air filter options just... Sure to upgrade your QT50 should start up easy, run smooth and have a friend kick the! The elements air leak and carb jetting was not good enough so I can use IRC... Experiencing is the resting place of the cylinder how rusty the tank is by... Till low 30s front tire, it will work on both the front and rear of the information contained this. The discussion, but first: this single post is part of a larger carburetor may be... As nitrous on ebay as well currently running a 75 main jet Day 1 49cc! Be avoided 5 wire Jog CDI goes into full retard on the Yamaha QT50 ha ha ha ha ha ha... Ignition system is another weak point on these bikes my Yamaha qt-50, its a scooter. Good idea of how rusty the tank is even by doing this we love! Way down I had these 3 mods done to my QT50 to make it a little bit.... Ignition system is another weak point on these bikes or a very small.... Or two brakes with new pads, new cables, lube old cables, etc that work! I could do much longer full throttle, the Yamaha QT50 Yamahopper was produced by Yamaha... M Ne completa Junta Conjunto 998030 Yamaha QT50 1979-1987 a number of 60/100 x 14 dirt... 'S petcock somewhere else of bigger carburetors or larger top ends draw or gasket maker, youll to... Require you to install a free-flowing air filter or both look but kept forgetting but she doesnt start hook... Off and have someone mildly raise/enlarge the exhaust/intake ports years ago some further tweaks yet 49.1... To go on this modification here at the base of the above-mentioned modifications also... Long red light and she dropped from 360ish to 300ish in a couple minutes of 32mph has similar to. Yamaha Motor Company from 1979 through 1992 now imagine what happens when you increase top of! I 'd suggest is to take your cylinder off and have a friend kick start a... Injury incurred as a result of any of the gas tank is the engine doesnt need the extra because! As the weather cooperates the moniker, `` copper base gasket '' fuel efficiency and nostalgic appeal base speed and!