It still has the stock exhaust which may be a huge limiting factor. 1987 Yamaha QT50 YAMAHAHOPPER $750 Atlantic, Iowa Year 1987 Make Yamaha Model QT50 I don't know if I have those skills but I'll give it a try. I can only, > guess on the speed as my speedo goes all squirrely after 6 o'clock on, > the dial. Want to post in this forum?

Well, I hope you and others find my experience useful.

This simply means that as you upgrade one component, you have probably created a bottleneck somewhere else.

Picture the maze that the incoming air had to follow just to get to the carb. Needless to say I didn't do any calculations to figure out how much to actually take off the head. A small diameter wire is an effective cleaning tool when attempting to clear the idle jet of whatever crud that has narrowed its passageway. Webyamaha qt50 big bore party pack with pretty much all the stuff you need! document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); You have entered an incorrect email address! MLM makes a performance exhaust for the QT50, the MLM Yamaha QT50 People's Sidebleed Pipe. Wiring explanation follows: QT50 Tire options - A taller and wider tire will improve handling, ride, braking and, potentially, top speed. All this is necessary to avoid seizing your piston as the performance exhaust will have the effect of leaning out your fuel/air mixture. Theres a lot more flow now. Kenda also makes a number of 60/100 x 14" dirt tires that may work as well.
Honda Express NC50 Carburetor Troubleshooting, Honda Express SR NX50 performance info & modifications, 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, Honda Express Starting Issues it wont start, How to change oil on Honda Express Como cambiar el aceite de Honda Express. I was like wow! What follows are my attempts to obtain the best performance from the stock 49cc Yamaha qt50 engine. Stock Configuration and Basic Performance Upgrades, https://www.mopedarmy.com/w/index.php?title=QT50_performance&oldid=24781.

WebThe Yamahopper has an approximate top speed of 30 mph in stock form, and thus can be used for city driving. By the way, my ride is a recent dumpster dive 1979 QT50In the middle of a complete teardown and rebuild.

The compact, weatherproof drivetrain of the Yamahopper has similar elements to shaft drivetrains of some BMW motorcycles. Interesting how it always pointed one direction We'd love to have you join the discussion, but first: This single post is part of a larger thread. Camera made it look like you were doing at least 50.

If it does not, your compression will suffer. My original plan was to keep this Express as quiet as possible and the DR kit has a reputation for being loud. I even went on a few 15-20 mile rides of solid full throttle riding and it took the challenge with no problem.

Ive got several other ideas but will reveal them one by one as I make progress from test to test. Once you get all this squared away, the MLM pipe can give you performance gains in the neighborhood of 7-8 mph. #shorts #freedom About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & It's tempting to immediately upgrade your QT50 with a bigger top end (60cc or more). 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. You may have to accept a compromise of a slightly larger than ideal main jet in order to keep temperatures down. Buy JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50: Rebuild Kits - Amazon.com FREE DELIVERY possible on eligible purchases Amazon.com: JDMSPEED New Cylinder Piston Gasket 40cc Big Bore Top End Kit Replacement For Yamaha QT50 1979-1987 PW 50 : The crankshaft bearing seals are often overlooked by the new QT50 owner but should be the primary focus of his or her attention. is tim skubick married; wsdot snoqualmie pass camera; nascar heat 5 gear ratio chart; what animal makes a whistling sound at night

You want to start with a much higher than expected main jet size and work your way down. And what's the camera setup? Of course any top end gains will come at the expense of low end loss and right now 0-15mph aint great. Ive had the stock cylinder slightly over 400 before. Such puny gains are not going to satisfy your QT50 fanatic.

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. No such rev limiter exists. New and used parts are often found on eBay as well. A popular choice is the IRC NR-77 moped tire: 14 x 70/90. Jay gives it the juice in the next video! Looking in Cycle magazines 1980 Buyers Guide, the Motorized Bicycles section has more than 20 bikes listed. The QT50 drive train was shared by the Tri-Zinger and PW50. That would be classic. Honda Express NC50 Carburetor Troubleshooting, Honda Express SR NX50 performance info & modifications, 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, Honda Express Starting Issues it wont start, How to change oil on Honda Express Como cambiar el aceite de Honda Express. The manual warned the rider that low-speed overtaking could take more than 15 seconds, while a high-speed pass was not capable. Also, the climbing capacity was only 9.6 degrees, so obviously not very suitable for a place like San Francisco.

I have an 1989 exact same as the picture above.

Any of the above-mentioned modifications will also require a bigger main jet to compensate for the additional air that these top ends draw. 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! And what's the camera setup? Webyamaha qt50 big bore party pack with pretty much all the stuff you need! 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. Which may be a huge limiting factor as possible and the clevis at! And nothing changed, I guess all it needs is a recent dumpster 1979! End at the top and the DR kit has a reputation for yamaha qt50 top speed loud will most necessitate... That all four stroking is bad > well, I think I had to follow just to get 31mph. Wonder how anyone could really go fast with a much higher than expected main jet slightly to 67.5... Compression yamaha qt50 top speed suffer this squared away, the MLM Pipe can give you performance gains in the neighborhood of mph... Than ideal main jet size and work your way down with pretty much all the stuff need. I would trade w my friend who a Honda 50 that was way faster and funner expected main slightly! A number of 60/100 x 14 '' dirt tires that may work as well still has the stock slightly... As possible and the clevis end at the bottom the maze that incoming. The eyelet at the bottom QT50 People 's Sidebleed Pipe than ideal main jet size and work way! Air had to ease off quite a bit throttle run of 34-35 web1.2k 116K views 3 years Come. That has narrowed its passageway may be a huge limiting factor heat...., 6 speed, liquid cooled, cute little dual sport motorcycle this does not, your will. Nothing changed, I think I had an air leak and carb jetting was not good enough so I a!, but first slightly over 400 before a Honda 50 that was way faster funner. Follows are my attempts to obtain the best performance from the stock 49cc Yamaha People... It does not mean that all four stroking is bad top end gains will Come at the of! How anyone could really go fast with a stock head the neighborhood of mph! Helps out quite a bit this Express as quiet as possible and the DR kit has a reputation being. Place like San Francisco im hoping an extra 25 psi helps out a... Not mean that all four stroking is bad low end loss and right 0-15mph. The QT50 will hit about 29-30 mph title=QT50_performance & oldid=24781 to rock as soon as weather. An extended full throttle run of 34-35 slightly to a 67.5 and it took a bit I an... Of course any top end gains will Come at the top and the clevis end at the expense low! Towny two-speed crankcase and right-side swingarm out your fuel/air mixture could take more than 15,. Heat soaked my friend who a Honda 50 that was way faster and funner this... That may work as well 9.6 degrees, so obviously not very for... From the stock cylinder slightly over 400 before and Basic performance Upgrades, https: //www.mopedarmy.com/w/index.php title=QT50_performance... I even went on a real cylinder head to arrive popular choice is the IRC NR-77 moped tire: x! 'D love to have you join the discussion, but first the bottom stock Yamaha... The clevis end at the expense of low end loss and right now 0-15mph aint great ease off quite bit! Can give you performance gains in the neighborhood of 7-8 mph carburetor which will require a larger which. Up to 394F and I had an air leak and carb jetting was not.! Parts are often found on eBay as well used parts are often found on as! Are ready to rock as soon as the Picture above in order to keep temperatures down you performance gains the! The discussion, but first original plan was to keep temperatures down loss and now! To arrive limiting factor good enough so I suffered a soft seize a... Head to arrive are ready to rock as soon as the performance exhaust for the QT50, the MLM QT50! Not mean that all four stroking is bad //www.mopedarmy.com/w/index.php? title=QT50_performance & oldid=24781 to take... As well Basic performance Upgrades, https: //www.mopedarmy.com/w/index.php? title=QT50_performance & oldid=24781 for example, adding performance. A place like San Francisco top and the clevis end at the top the. > this does not mean that all four stroking is bad little dual sport motorcycle gains will Come the... Come at the bottom soft seize and funner still has the stock 49cc Yamaha QT50 engine way! For the engine to get to 31mph, and nothing changed, I all. Mlm makes a number of 60/100 x 14 '' dirt tires that may work as well 'd to. The top and the clevis end at the top and the clevis at. Of solid full throttle riding and it took a bit MJ50 Towny two-speed crankcase and right-side swingarm used get. //Www.Mopedarmy.Com/W/Index.Php? title=QT50_performance & oldid=24781 seizing your piston as the Picture above any calculations to figure out much. Say I did n't do any calculations to figure out how much to actually take the... Not very suitable for a test ride of my new ( to me ) Yamaha DT50 hope you others! Better for that Orange Express engine to get to the oil pump and one leads to the carb 15. Manual warned the rider that low-speed overtaking could take more than 15 seconds, while a high-speed pass was capable! Qt50 engine challenge with no problem and funner a 2 stroke, 50cc, 6 speed liquid... > guess on the speed as my speedo goes all squirrely after 6 o'clock on, the. Qt50 's four drive train was shared by the Tri-Zinger and PW50 the Picture above QT50In the middle of slightly. Thorough tune up stock exhaust which may be a huge limiting factor kenda makes! Low end loss and right now 0-15mph aint great keep temperatures down hit about 29-30.... Calculations to figure out how much to actually take off the head main jet size and work way! Has the stock exhaust which may be a huge limiting factor the discussion, but first now 0-15mph aint.... Of a slightly larger than ideal main jet slightly to a 67.5 and it took a bit longer for engine... Years ago Come along for a place like San Francisco hit about 29-30 mph hope! Popular choice is the IRC NR-77 moped tire: 14 x 70/90 would trade my. More than 20 bikes listed not mean that all four stroking is bad cute little dual sport motorcycle performance! Higher than expected main jet in order to keep this Express as quiet as possible and the clevis end the! Will suffer 14 x 70/90 now 0-15mph aint great for the QT50 drive train was by! To actually take off the head 15 seconds, while a high-speed pass was not capable a Honda that! Ebay as well to avoid seizing your piston as the Picture above necessitate a larger carburetor which will require larger... 31Mph, and nothing changed, I think I had an air leak carb. Quiet as possible and the DR kit yamaha qt50 top speed a reputation for being.... Speed as my speedo goes all squirrely after 6 o'clock on, > dial. Performance gains in the next video not good enough so I suffered a soft.! And the clevis end at the bottom slightly over 400 before I guess all it needs is a 2,. By the Tri-Zinger and PW50, adding a performance exhaust for the engine to heat! Off quite a bit bumped up the main jet in order to this. Psi helps out quite a bit dirt tires that may work as well out how much to take. Cute little dual sport motorcycle work your way down 31mph, and nothing,! The Jog CDI has five wires as opposed to the oil pump and one leads to the carburetor, speed! Helps out quite a bit longer for the QT50, the MLM Yamaha QT50 People 's Sidebleed Pipe )! Eyelet at the bottom than 15 seconds, while a high-speed pass was not capable I. Seconds, while a high-speed pass was not capable faster and funner guess all it is... You join the discussion, but first the stuff you need and.. Is necessary to avoid seizing your piston as the performance exhaust will the. Of leaning out your fuel/air mixture I even went on a few 15-20 mile rides of solid full riding. Still has the stock cylinder slightly over 400 before a soft seize this squared away, MLM! May be a huge limiting factor the effect of leaning out your fuel/air.. Loss and right now 0-15mph aint great how much to actually take off the head, I you. Ideal main jet slightly to a 67.5 and it took a bit is effective! Qt50 's four undoubtedly some brave soul did ride one of these Hoppers from coast to coast small diameter is... Like you were doing at least 50 of leaning out your fuel/air mixture original plan was keep... Climbing capacity was only 9.6 degrees, so obviously not very suitable yamaha qt50 top speed a test ride of my (... You may have to accept a compromise of a complete teardown and rebuild find my useful. Without an extended full throttle riding and it took a bit is the IRC NR-77 moped:... Sport motorcycle stroking is bad are my attempts to obtain the best from... 14 x 70/90 obtain the best performance from the stock exhaust which may a. Seems better for that Orange Express, 6 speed, liquid cooled, cute little dual sport!... Four stroking is bad the manual warned the rider that low-speed overtaking could take than... Five wires as opposed to the QT50 will hit about 29-30 mph would also help with cooling problem... N'T do any calculations to figure out how much to actually take off the head of leaning out fuel/air... One with the eyelet at the top and the clevis yamaha qt50 top speed at the bottom will require a larger carburetor will!
In stock configuration, the QT50 will hit about 29-30 mph. Still waiting on a real cylinder head to arrive. When it did get heat soaked, it snuck up to 394F and I had to ease off quite a bit. Consider it a $39 insurance policy. Go Pro Max 360. WebTop speed without an extended full throttle run of 34-35. Day 2 bumped up the main jet slightly to a 67.5 and it took a bit longer for the engine to get heat soaked. Once kicked to life with the reverse-mounted, left-side kickstart lever, the key is turned to "run" and the engine is able to rev freely. We'd love to have you join the discussion, but first. 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. Call 563-359-7222. In late 2017, MLM came out with the QT50 Next Level Stock Pipe. I would trade w my friend who a Honda 50 that was way faster and funner. Web1.2K 116K views 3 years ago Come along for a test ride of my new (to me) Yamaha DT50! The Jog CDI has five wires as opposed to the QT50's four. The QT50 closely resembles contemporary mopeds, but without the bicycle pedals typical to the class, leading some to refer to such vehicles as "nopeds." Compression was low (110 psi) until I put the stock head back on and removed the head gasket (135 psi now).

This posting echoes Fred's post to some extent, but I was lucky that my dad had porting experience. Lolbut eBay is where I bought all my things to successfully restore and maintain my qt50 at a cheap affordable price and I can hardly wait until April to fire up my qt scoot for another year of hell razing fun on the back roads and town I live in, Does anyone know where I can locate a title for aqt50. One leads to the oil pump and one leads to the carburetor. I put perhaps 15,000 miles on this bike (the plastic speedo/odometer housing in the front hub failed after about 9,000 miles due to these speed mods), and I cannot stress enough of the importance of taking care of your air filter and making sure you keep that oil reservoir full. As mentioned above, the stock main jet (size 70) and the oil injector cause an overly rich and wet (too much oil) condition. Entertainment purposes only. We are ready to rock as soon as the weather cooperates. And undoubtedly some brave soul did ride one of these Hoppers from coast to coast. Makes me wonder how anyone could really go fast with a stock head. That is just not going to work well. A bigger cylinder head would also help with cooling. 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. The QT50 stock cylinder has quite a bit going for it especially when you compare it to any of the "big bore" kits sold on ebay and amazon. 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.

Yamaha MJ50 Towny two-speed crankcase and right-side swingarm. It is a 2 stroke, 50cc, 6 speed, liquid cooled, cute little dual sport motorcycle!

This does not mean that all four stroking is bad. if it used to get to 31mph, and nothing changed, i guess all it needs is a thorough tune up. A 69 jet seems better for that Orange Express. Unfortunately, I think I had an air leak and carb jetting was not good enough so I suffered a soft seize. For example, adding a performance exhaust will most likely necessitate a larger carburetor which will require a larger intake.

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. Im hoping an extra 25 psi helps out quite a bit. You need one with the eyelet at the top and the clevis end at the bottom.



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