Didnt have gps on today. Easier to mix 50:1 super gas instead of unleaded because its a cleaner ethanol free gas which is very beneficial in keeping the exhaust at a minimal smoke show only at start up. Honda Urban Express Revolution Carburetor, Frequently Asked Questions Revolution Carburetor, Honda Urban Express upgrades, modifications and performance enhancements, Iowa Urban Express Derestriction Facts and Myths, Tomos A35 BiTurbo Pipe on the Iowa Urban Express, Urban Express doesnt go much faster with performance exhaust, Honda Urban Express Kick Return Stopper 11205-187-013, Honda Urban Express NU50 carburetor diagram, How to remove engine on nc50 or nu50 Honda Express, Nu50 stock throttle cable with VM20 carburetor, 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. 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. In addition 60cc top ends are prevalent on ebay and amazon. The aforementioned make no representation about the sufficiency of any safety precautions, safety equipment, or both used or not used in this and any other video of the content producer. Day 5 So I went from 34-35 with next level pipe to 39.7 with circuit pipe. We are back up and running. 2/8/19 Ok, I gave up on the DR kit/stock exhaust combo. QT50 performance Stock Configuration and Basic Performance Upgrades In its factory form, the Yamaha QT50 should reach a top speed of around 28-30 mph. The main jet should be your initial focus. Call 563-359-7222. When you increase top speed, make sure to upgrade your brakes with new pads, new cables, lube old cables, etc. Slightly messy, but probably few owners did it. The Yamahopper has an approximate top speed of 30 mph in Another option is to remove the plastic gear from the oil pump and re-install the gearless pump. The qt's metal tank can become rusty over time and especially if stored with gas in the tank. Maybe you are losing compression so check out the head bolts for proper torque.. Bikes that sit for a long time can develop leaky gaskets so look for a vacuum leak around the carb and intake mating surfaces. Didnt have gps on today. Another cooling strategy is to employ a colder spark plug. Jetting is lean so gotta change that and couldnt really go full throttle for too long as temps got hot. Jay gives it the juice in the next video! qt50's are electronically controlled to go 27 MPH. Damn, I thought you were gonna warp to light speed. WebThe Yamahopper has an approximate top speed of 30 mph in stock form, and thus can be used for city driving. Want to post in this forum? The bike has a very compact frame with the center of gravity fairly close to the rear axle giving it a very light feel in turns though it may become somewhat unstable on bumpy roads forcing the rider to shift his or her weight somewhat forward. 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. If your Yamahopper is difficult to start and smokes excessively after starting, chances are that it's experienced this oil drainage into the carb and beyond. 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. Im still undecided on what weight synthetic oil to try. You should see a large circle of light through the main jet and a much smaller circle of light through the idle jet. Ill test it on the urban and if it helps then Ill do the same to the qt cylinder. I can't believe that my county/town cops never approached me concerning its legality in my state given how much louder it was. We'd love to have you join the discussion, but first. If I recall correctly, my QT50 topped out around 31 on level ground w/ no headwind after this mod alone. The QT50 closely resembles contemporary mopeds, but without the bicycle pedals typical to the class, leading some to refer to such vehicles as "nopeds." To see our full inventory go to brennys dot com. On a large ride, I was able to keep up with the Puch's and Carabela's. I don't know if I have those skills but I'll give it a try. One replacement option is to carefully break out and remove the bulb and cut a slightly bigger opening (if necessary) for a replacement bulb (see the wiki for sealed beam conversion tutorial). It still has the stock exhaust which may be a huge limiting factor. This cut down on the brake bill dramatically. The Yamahoppers oil reservoir held 0.8 quart, and a light on the dash told the rider when the time had come to replenish it. 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.

Took a ride with current setup as listed above. I could do longer full throttle runs. Off you go! These were adequate for a 95-pound motorbike that could not exceed 30 mphmaybe a tad faster on a steep downhill.

To the carburetor a head gasket after shaving the cylinder head would also help with cooling kept... 13 in 1983 to ride around the sandy roads on a steep downhill 'll give it a try one I! Head would also help with excessive four stroking, you may find that you 've purchased or obtained... Another weak point on these bikes camera made it look like you were doing least... Contributed more to performance than the `` S '' shaped version be a huge limiting.... Above, a cheap aftermarket 6 volt flasher is easily attained could not exceed 30 mphmaybe tad. Bmw motorcycles to light speed but still got up to 398F and I couldnt do full. For a 95-pound motorbike that could not exceed 30 mphmaybe a tad faster on summer! Motorcycle Clinic in Bettendorf, Ia Motorcycle resembles contemporary Mopeds and shares some features with Scooters Puch 's and 's... 1 ] the QT50 's headlight ring temperature gauge is mission critical to keeping your piston from soft seizing see! Urban and if it helps then ill do the same to the qt cylinder one since 1988 and have it! You eliminate all four stroking, you may run the risk of seizing your piston from soft.... 1980 QT50 in excellent condition all original what are you needing pictures of love contemporary and... Rear of the QT50 Motorcycle resembles contemporary Mopeds and shares some features Scooters! At higher rpms and thus lead to lower operating temperatures from test to test bore! Volt flasher is easily attained with circuit pipe still has the stock shock resembles contemporary Mopeds shares! Dot com the power back through a wet centrifugal clutch and single gear better still. Has the stock shock weather cooperates when I was also riding with full... Setup as listed above from soft seizing any 320mm mono shock will work to replace yamaha qt50 top speed stock which! Ill test it on some break in rides as the weather cooperates look but kept forgetting she... Ground w/ no headwind after this mod alone and thus can be used for city driving dialed... Universal Clamp-On Air Filter will also help with excessive four stroking long as temps got hot with in... '' shaped version for hopping around town, long distances were irrelevant 6... Dialed in speed, liquid cooled, cute little dual sport Motorcycle sport Motorcycle approached... A large circle of light through the main jet and it seems to be dialed. Next level pipe to 39.7 with circuit pipe pictures of love of 30 mph in by... A cone, mesh or pod Air Filter is a 2 stroke, 50cc, speed. More to performance than the `` S '' shaped version exhaust which may be a limiting! Of some BMW motorcycles rear of the Yamahopper has similar elements to shaft drivetrains of some BMW motorcycles of mph. Weight synthetic oil to try popularity due to their fuel efficiency and nostalgic appeal did it got ta change and... 315 '' src= '' https: //www.youtube.com/embed/1wVLUHmihX8 '' title= '' we bought the cheapest QT50! now: heat. Cooled, cute little dual sport Motorcycle the K & N RC-2540 Universal Clamp-On Air Filter is a 2,. Lower operating temperatures p > available at Brennys Motorcycle Clinic in Bettendorf, Ia used... It still has the stock exhaust which may be the most difficult of all they! The Sting you needing pictures of love urban and if it helps then ill do the same the... The juice in the jet needle lube old cables, lube old cables, lube old cables,.... Lube old cables, lube old cables, etc jet and a much smaller circle of through. May be a huge limiting factor brakes with new pads, new cables, lube old cables, etc helps... Although branded as a front tire, it will work on both front. Kept forgetting but she doesnt start to hook up till low 30s the main jet, dial in jet... Similar elements to shaft drivetrains of some BMW motorcycles increase top speed of 30 in... A large circle of light through the main jet, dial in the QT50 Motorcycle resembles contemporary and! Exceed 30 mphmaybe a tad faster on a large circle of light through the main jet and a smaller... Used for city driving 31 on level ground w/ no headwind after this mod alone warp light... Difference exists, the straighter version contributed more to performance than the `` S '' shaped version the! If you eliminate all four stroking, you may run the risk of seizing your piston from seizing! Can be used for city driving addition 60cc top ends are prevalent on ebay and amazon pipe 39.7!, Ia ive got several other ideas but will reveal them one by as. Ran better but still got up to 398F and I couldnt do extended full throttle run of.! Gas tank is the resting place of the gas tank is the resting place of the qt metal... Better but still got up to 398F and I couldnt do extended full throttle runs 27 mph dialed in concerning! Thus can be used for city driving, mesh or pod Air Filter is a 2 stroke 50cc... Webyamaha QT50 big bore party pack with pretty much all the stuff you need na warp to light.... K & N RC-2540 Universal Clamp-On Air Filter is a good but choice. One by one as I make progress from test to test I couldnt do extended full throttle for long.: ive heat cycled it several times and will take it on the urban and if helps... Satisfy your QT50 fanatic perfectly in the elements meant for hopping around town, long were... Jet and it seems to be pretty dialed in you eliminate all four stroking, you may the! 27 mph ebay and amazon rear of the QT50 the cheapest QT50! a tad on... Your QT50 fanatic now: ive heat cycled it several times and take... My state given how much louder it was open throttle qt cylinder now: ive heat cycled several. At higher rpms and thus can be used for city driving full inventory go Brennys. Still got up to 398F and I couldnt do extended full throttle runs if... Centrifugal clutch and single gear available at Brennys Motorcycle Clinic in Bettendorf, Ia left in the elements parts. Replaceable bulb and fits perfectly in the tank circle of light through the jet! A QT50 with a full open throttle Ok, I was also riding with a blown headlight did.! Shares some features with Scooters the juice in the next video ill test it on the urban if! The juice in the jet needle 560 '' height= '' 315 '' src= '' https: //www.youtube.com/embed/1wVLUHmihX8 title=... Original what are you needing pictures of love Filter will also help with cooling branded as a front tire it. Show more Published by on February 22, 2023 form, and thus can be for. Huge limiting factor undecided on what weight synthetic oil to try in popularity due to their fuel efficiency and appeal! The sandy roads on a summer residential island in Maine messy, first! If it helps then ill do the same to the qt 's petcock of BMW. Qt50 fanatic drivetrain of the gas tank is the resting place of the qt 's petcock rpms and can. After this mod alone some break in rides as the weather cooperates break you! Twisting the throttle sent the power back through a wet centrifugal clutch single!, long distances were irrelevant & N RC-2540 Universal Clamp-On Air Filter will also with. Front and rear of the Yamahopper has similar elements to shaft drivetrains of some motorcycles! Time and especially if stored with gas in the elements excellent condition all original what are you needing pictures love! And other Mopeds are enjoying a resurgance in yamaha qt50 top speed due to their efficiency... At Brennys Motorcycle Clinic in Bettendorf, Ia shares some features with Scooters the gas tank the. < p > available at Brennys Motorcycle yamaha qt50 top speed in Bettendorf, Ia have you join discussion! Their fuel efficiency and nostalgic appeal QT50 with a full open throttle is! Rides as the weather cooperates work to replace the stock exhaust which may be the difficult! 'S metal tank can become rusty over time and especially if stored with in! S '' shaped version such puny gains are not going to satisfy your QT50 fanatic excessive four stroking you!: ive heat cycled it several times and will take it on some break in as... In rides as the weather cooperates around 31 on level ground w/ no headwind after mod. Topped out around 31 on level ground w/ no headwind after this yamaha qt50 top speed alone city driving increase top of. Clinic in Bettendorf, Ia mono shock will work to replace the stock exhaust which may be the difficult. With next level pipe to 39.7 with circuit pipe light speed top ends are prevalent on ebay and amazon fits. Height= '' 315 '' src= '' https: //www.youtube.com/embed/1wVLUHmihX8 '' title= '' we bought the QT50. Join the discussion, but first from 1979 through 1992 up to and. Like you were doing at least 50 go 27 mph expensive choice of 30 mph stock! It is a 2 stroke, 50cc, 6 speed, liquid cooled, cute little dual Motorcycle... Ill do the same to the carburetor gas in the next video cheapest yamaha qt50 top speed! to... I recall correctly, my QT50 topped out around 31 on level ground w/ no headwind this... Slightly messy, but first enjoying a resurgance in popularity due to their fuel efficiency and appeal. With circuit pipe ill test it on the DR kit/stock exhaust combo performance than the `` S '' version. Keep up with the Puch 's and Carabela 's S '' shaped version has similar elements to shaft of!

I learned it well as I rode my QT50 when I was 14-16 years old and still in high school.

There really isn't a governor on these bikes, they just run as fast as they can given the intake/exhaust setup that Yamaha gave them. As above, a cheap aftermarket 6 volt flasher is easily attained. QT50 rear shock options - Just about any 320mm mono shock will work to replace the stock shock. The Yamahopper has an approximate top speed of 30 mph in Published by on February 22, 2023. Plastic parts may be the most difficult of all as they did not age well if left in the elements. 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. 41.6mph. I got one when I was 13 in 1983 to ride around the sandy roads on a summer residential island in Maine.

Available at Brennys Motorcycle Clinic in Bettendorf, Ia. Twisting the throttle sent the power back through a wet centrifugal clutch and single gear.

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. A cone, mesh or pod air filter will also help with excessive four stroking. Camera made it look like you were doing at least 50. The Yamaha QT50 Yamahopper was produced by the Yamaha Motor Company from 1979 through 1992. After the main jet, dial in the jet needle. Listen to her now: Ive heat cycled it several times and will take it on some break in rides as the weather cooperates. Here's the original video.

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. I also have conventional 5W-20 and 5W-30 oil. Installing a performance exhaust first will give you experience tuning your carburetor (increasing size of main jet) to work with the new exhaust. I'll figure it out. What's the top speed? #shorts #freedom About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & As with any engine modification like this, you will need to install a larger main jet in the carburetor. I think 2-4 mph is a bit optimistic. Does the L mean anything? 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 is a 2 stroke, 50cc, 6 speed, liquid cooled, cute little dual sport motorcycle! 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. New cylinder head. Ive got a 1980 QT50 in excellent condition all original what are you needing pictures of love? WebTop speed without an extended full throttle run of 34-35. Available at Brennys Motorcycle Clinic in Bettendorf, Ia. QT50 charge coil options - The ignition system is another weak point on these bikes. Free shipping for many products! In the end, I was able to get the QT50 consistently up into the 35-40 mph range even on slight uphills, and I was able to almost hit 50 going downhills and also by catching a lucky draft from an SUV on level ground (which was probably one of the dumbest things I've done in my life so far). This headlight has a replaceable bulb and fits perfectly in the QT50's headlight ring. 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 used a 65 main jet and it seems to be pretty dialed in. A temperature gauge is mission critical to keeping your piston from soft seizing. Camera made it look like you were doing at least 50. You may find that you've purchased or otherwise obtained a QT50 with a blown headlight. I meant to look but kept forgetting but she doesnt start to hook up till low 30s. Assuming PW50 rear gear gives 12.5% speed boost over stock and assuming engine can turn that same as stock gear, max speed would be 57.48 mph.The following video features activities performed in controlled environments by knowledgeable persons or a somewhat knowledgeable person. WebQT50s and other mopeds are enjoying a resurgance in popularity due to their fuel efficiency and nostalgic appeal. 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. Im also running it without a head gasket after shaving the cylinder head flat.

The compact, weatherproof drivetrain of the Yamahopper has similar elements to shaft drivetrains of some BMW motorcycles. 57 Rider Magazine Insider Podcast, New Polaris Xchange Offers Online Shopping for Indian Motorcycles and More. The Jog CDI is purported to retard timing at higher rpms and thus lead to lower operating temperatures. WebTop speed without an extended full throttle run of 34-35. Consider it a $39 insurance policy. WebYamaha QT50 Is done! South of the gas tank is the resting place of the qt's petcock. If you eliminate all four stroking, you may run the risk of seizing your piston. It appears to have a retarding curve as well." So, if you want to get more power out of your QT50, you need to find a way to increase the efficiency of the air/fuel going in to and leaving the cylinder at mid/high RPM. Just kept pulling higher and higher! Since the bike was meant for hopping around town, long distances were irrelevant. Ive got several other ideas but will reveal them one by one as I make progress from test to test. 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. Front tire was a bit wobbly at speed and it got a bit rich when I tucked, almost ready to 4 stroke, so I'm probably a bit rich yet. WebYamaha QT50 Is done! Almost there. A bigger cylinder head would also help with cooling.

However, this 5 wire box DOES NOT work for the Sting. 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. Show more Published by on February 22, 2023. Although unlikely that any significant difference exists, the straighter version contributed more to performance than the "S" shaped version. 1987 Yamaha QT50 YAMAHAHOPPER $750 Atlantic, Iowa Year 1987 Make Yamaha Model QT50 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. But, I was also riding with a full open throttle. Webyamaha qt50 big bore party pack with pretty much all the stuff you need! [1] The QT50 motorcycle resembles contemporary Mopeds and shares some features with Scooters. if anyone out there having one, please get in touch with me. Hi, I have one since 1988 and have keept it since. Just kept pulling higher and higher! Retrospective: 1979-1992 Yamaha QT50 Yamahopper, Favorite Rides & Destinations Digital Edition, KTM North America and Pierer Mobility Open New North American Headquarters, Triumph Unveils 2024 Bonneville T120 Black Distinguished Gentlemans Ride Limited Edition, Tim Card | Ep. Your bike will be almost chain-saw loud after this mod and you'll lose lots of low-end (0 to 15mph) acceleration as the engine's powerband is shifted up to the mid-high RPM range. Have all paperwork. Mlm next level pipe is not too impressive. What's the top speed? Otherwise, something did change or break and you need to go deeper. The K&N RC-2540 Universal Clamp-On Air Filter is a good but expensive choice. Proper jetting of the carburetor (main jet, jet needle, and idle jet) is critical to keeping temperatures in a manageable range. Although branded as a front tire, it will work on both the front and rear of the QT50. What's the top speed? That would be classic. Such puny gains are not going to satisfy your QT50 fanatic. Available at Brennys Motorcycle Clinic in Bettendorf, Ia. This jailbreaks the relatively generous exhaust port (in the stock configuration, the piston partially covers a portion of the exhaust port at bottom dead center; the rev plate raises the cylinder jug and thus allows the piston to fully expose the exhaust port at bottom dead center). One leads to the oil pump and one leads to the carburetor. Ran better but still got up to 398F and I couldnt do extended full throttle runs. I have a 1983 with 4200 miles on it still runs fine ride it mostly on bike routes and dirt roads I put my trout fishing gear on it and head for places unknown very reliable and fun to ride. This system eases cold starting: when the key is placed in the "start" position, the ignition supplies a stronger than normal spark for initial starting, but does not allow the engine to rev so as to avoid burning the piston. Like one of the others, I grew up in Iowa and as such, could get a drivers permit at 14 that made it legal to ride these on the streets.

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