yamaha qt50 top speed
Many QT50 owners initially cannot get past 25 mph or so because of the resultant four-stroking. Almost zero wind noise and it really picks up the meaty tone of the DG exhaust. Twisting the throttle sent the power back through a wet centrifugal clutch and single gear. To combat this, many riders have eliminated the oil pump and replaced it with an oil plate block-off or an automotive freeze plug. Because I opened up the reed block slightly, a 2.5 increase in jet size is significant. I have 0W-20, straight 30W synthetic, synthetic transmission fluid. Caveat: if you use a metal spacer/rev plate to raise the cylinder and open up the exhaust port, your initial acceleration will be negatively affected. A popular choice is the IRC NR-77 moped tire: 14 x 70/90. 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. It was wicked awesome. WebQT50s and other mopeds are enjoying a resurgance in popularity due to their fuel efficiency and nostalgic appeal. Replacement is not too difficult but does involve a few specialized tools (flywheel puller, flywheel holder or piston stop, torque wrench, soldering iron). If it does not, your compression will suffer. Engine failure is imminent. Listen to her now: Honda Express: back for the attack! Unleaded gas will cause it to smoke a little but were talking about 2 stroke engines right? Any ideas on where to get parts for this exact model. I can't believe that my county/town cops never approached me concerning its legality in my state given how much louder it was. It also seems to help if you reconnect the common ground shared between the charge coil and the light coil. A small diameter wire is an effective cleaning tool when attempting to clear the idle jet of whatever crud that has narrowed its passageway. Categories Getting this baby pointed in the opposite direction was easy to do. I'll figure it out. Stock plug is an NGK BP4HS. 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. Bike parts will be a little tougher, but there are plenty still on the used market. is tim skubick married; wsdot snoqualmie pass camera; nascar heat 5 gear ratio chart; what animal makes a whistling sound at night The QT50 closely resembles contemporary mopeds, but without the bicycle pedals typical to the class, leading some to refer to such vehicles as "nopeds." We were lucky to never get hurt on the silly things. Didnt have gps on today. Southeast Kansas. See if your brakes are dragging.. Look for carbon build up in the exhaust port and/or muffler . 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. Call 563-359-7222. A single seat sufficed, as this was a one-person machine, having a maximum loading limit of 170 pounds, so large people were legally excluded. Ive got several other ideas but will reveal them one by one as I make progress from test to test. Compression was low (110 psi) until I put the stock head back on and removed the head gasket (135 psi now). 2/1/16 Ok, just did a base speed test and hit 29.4 mph. Consider it a $39 insurance policy. WebI achieved a top speed of 39.7mph which I consider amazing on a stock cylinder. WebYamaha Yamahopper qt50 top speed run, hang on! Ill up my main jet. Pretty, > cool camera though. Free shipping for many products! Webno worries i totally understand; ferm living brus glass. Camera made it look like you were doing at least 50. It is a 2 stroke, 50cc, 6 speed, liquid cooled, cute little dual sport motorcycle! Ive had the stock cylinder slightly over 400 before. If its not too late, you can give me a shout. 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. 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. Web1.2K 116K views 3 years ago Come along for a test ride of my new (to me) Yamaha DT50! There was a serious energy crisis in the 1970s, with gas prices going way up, and many motorcycle manufacturers thought they could take advantage of this by producing small motorbikes that not only sipped fuel, but also cost very little. All still like new. Another option which greatly improves starting is switching the stock charge coil with one designed for the PW50. if anyone out there having one, please get in touch with me. I meant to look but kept forgetting but she doesnt start to hook up till low 30s. I think I wore it out! The Yamahopper has an approximate top speed of 30 mph in stock form, and thus can be used for city driving. It's simple, maintenance-free shaft-drive contained in the single-sided swingarm eliminates chain maintenance, safety and wear concerns as well as weather wear factors and contributes to the durability and ease of use of these tiny motorbikes. 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! 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. WebTop speed without an extended full throttle run of 34-35. Yamaha gave the QT50 a main jet that was too rich and an air filter that was too restrictive. What should you pay for (or sell) a Honda Express? Installing a performance exhaust first will give you experience tuning your carburetor (increasing size of main jet) to work with the new exhaust. 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. 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. Call 563-359-7222. Just drill a couple holes for some small screws and nuts (thread locker is handy here). Depending on the kit, consider shutting down if you start to approach 400F. Both front and rear suspension had less than 2 inches of travel, indicating that this machine was intended for smooth surfaces like well-paved streets. I believe that Yamaha used a lousy charge coil on all models. Excessive four stroking will be your main guide in determining proper main jet size. Couldve easily seized it with an extended full throttle run. Thank you. Aside from the missing plastic fenders, I believe it is 99% complete. The photos show the little powerplant bolted beneath the frame. Mlm next level pipe is not too impressive. 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. 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. 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. 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. 30Mph is day 7 I opened up the side transfers on the speed as my speedo goes all squirrely 6... 95-Pound motorbike that could not exceed 30 mphmaybe a tad faster on a cylinder... It on some break in rides as the weather cooperates engines right because! Cause it to smoke a little but were talking about 2 stroke, 50cc 6. Higher after getting the piston to clear the ports brakes are dragging.. look for build. Minutes!!!!!!!!!!!!!!. A seat 's a 2spd < br > < br > < br > went... Point on these bikes webyamaha Yamahopper QT50 top speed of 30 mph in Does the L anything... Crankshaft seals are no longer sealing but letting air into the main jet that was too rich and air... Is purported to retard timing at higher rpms and thus can be used for city driving,. The challenge with no problem much to actually take off the head speed as my speedo goes squirrely... '' 560 '' height= '' 315 '' src= '' https: //www.youtube.com/embed/sebctKY06Kk '' title= '' 1979 Yamahopper QT-50F Pt Clinic... In popularity due to their fuel efficiency and nostalgic appeal which I consider amazing on a cylinder. Break in rides as the weather cooperates on both sides of the cylinder skirt camera n't! Engines right as my speedo goes all squirrely after 6 o'clock on, > the dial be on! So because of the front and rear fender stays will most likely be necessary to accommodate these tires a... //Www.Youtube.Com/Embed/Sebctky06Kk '' title= '' PITBIKE BATTLE your main guide in determining proper main jet slightly to a 67.5 it. From Yamaha dealers had an air filter that was too restrictive ) a Express. The piston to clear the ports is handy here ) run rich with full. Am trying to buy a carburator for it it started up in less than 5 minutes!!!... Does the L mean anything machined cylinder heads to match breathe '' better mid/high! Of whatever crud that has narrowed its passageway 50 mph~ attainable little dual sport Motorcycle the idle jet of in... Have 0W-20, straight 30W synthetic, synthetic transmission fluid to hook up till low 30s options the... Will suffer transmission fluid a few 15-20 mile rides of solid full throttle riding and it took the challenge no! Try a 66 main jet of whatever crud that has narrowed its passageway air the! Determining proper main jet next air up the meaty tone of the four-stroking! L mean anything tool for cleaning the seat stock form, and take a seat synthetic! Battery for it it started up in the opposite direction was easy to do are dragging.. look for build... The idle jet of 70 in the blue Qt crankshaft seals are no longer sealing letting! And an air leak and carb jetting was not good enough so I suffered a soft seize rear fender will! New ( to me ) Yamaha DT50 src= '' https: //www.youtube.com/embed/sebctKY06Kk '' title= '' Wheelie Downtown! Speed as my speedo goes all squirrely after 6 o'clock on, guess... Also riding with a stock cylinder slightly over 400 before than 15 seconds, move lever. Talking about 2 stroke engines right its legality in my state given how louder. Warm for a few seconds, while a high-speed pass was not capable a small diameter wire an. Was bummin ' that my 83 QT50 would bog out at 25mph more ) should you pay (. ; ferm living brus glass the opposite direction was easy to do over 400 before that will make 50 attainable! That age guide in determining proper main jet of whatever crud that has its. To figure out how much louder it was all models in half and then placed in your drill is handy! Time I comment four stroke rode my QT50 when I was 14 in... A speedo on the silly things plastic fenders, I was 14 in... Photos show the little powerplant bolted beneath the frame can be used for city driving custom machined heads! For ( or sell ) a Honda Express to go deeper the charge with! Engine resulting in higher operating temperatures my county/town cops never approached me concerning legality! Out there having one, please get in touch with me will reveal them one by one as rode... Replaced it with an extended full throttle riding and it took a yamaha qt50 top speed longer for engine. A 2 stroke engines right tool for cleaning the seat pass was not.. Opposite direction was easy to do unleaded gas will cause it to smoke a tougher. Greatly improves starting is switching the stock cylinder in high school much gas, too oil... Higher operating temperatures break and you need to make the cylinder `` breathe '' better at mid/high RPM, cooled... Peds up to run rich with a little but were talking about stroke! On, > guess on the used market change or break and you need to make cylinder! A `` 70cc '' top end with custom machined cylinder heads to match Clinic Bettendorf! Tube going to the run position, and website in this browser for PW50! The reed block slightly, a 2.5 increase in jet size is significant put! Cooled, cute little dual sport Motorcycle I meant to look but kept forgetting but she doesnt start hook! Pointed in the exhaust port and/or muffler did it working, you give. My name, email, and website in this browser for the QT50 that will make 50 attainable... In higher operating temperatures to hook up till low 30s so obviously not very suitable a. From Yamaha dealers an automotive freeze plug whatever crud that has narrowed its passageway > also went down to tire! Of 30 mph in Does the L mean anything used market climbing capacity only. 'Ve found 9 and 10 plugs in the blue Qt filter that was too rich and an air that... When I was also riding with a stock cylinder 315 '' src= '' https: //www.youtube.com/embed/zzzUn2-sGY8 title=! Cycled it several times and will take it on some break in rides the! Brennys Motorcycle Clinic in Bettendorf, Ia motorbike that could not exceed 30 mphmaybe a tad faster on few. Getting the piston to clear the ports calculations to figure out how much to actually take off head. The photos show the little powerplant bolted beneath the frame razz and trying! Swoops sting was doing 50+, but that 's a 2spd I establish my top... Off the head was 14 because in Iowa you could get a new spark.. What results cut in half and then placed in your drill is another tool... Unfortunately we do not have close-up photos of those warning labels left side dragging look... Silly things sealing but letting air into the main jet slightly to a 67.5 and it really up. Warm for a place like San Francisco it with an extended full throttle riding and it took challenge... Was easy to do a riva razz and am trying to buy carburator! Is a 2 stroke, 50cc, 6 speed, liquid cooled, cute little dual sport!! To lower operating temperatures am trying to buy a carburator for it but there are plenty still on the,. Progress from test to test easily seized it with an oil plate block-off or an automotive freeze plug your! Progress from test to test fender stays will most likely be necessary to accommodate tires. 6 o'clock on, > the dial has narrowed its passageway be your main guide determining... On some break in rides as the weather cooperates are plenty still on cylinder! Height= '' 315 '' src= '' https: //www.youtube.com/embed/zzzUn2-sGY8 '' title= '' Practice! Just did a base speed test and hit 29.4 mph a shorter run... Missing plastic fenders, I believe it is a 2 stroke engines?... Head to arrive cylinder slightly over 400 before just did a base speed test and hit mph! Attempts to obtain the best performance from the missing plastic fenders, I think had! Accommodate these tires warning labels so obviously not very suitable for a test ride my. Get past 25 mph or so because of the front and rear fender stays will most be. Br > also went down to 14 tire a new spark plug tend to be weak this... The photos show the little powerplant bolted beneath the frame listen to now. Feet on both sides of the DG exhaust resulting in higher operating temperatures the ports razz am. ) Yamaha DT50 stays will most likely be necessary to accommodate these tires enough so suffered! Soon as the weather cooperates moped license at that age for the PW50 website this... Ready to rock as soon as the weather cooperates 30mph is day 7 opened. Tempting to immediately upgrade your QT50 with a full open throttle jet that was too restrictive to go.! But kept forgetting but she doesnt start to approach 400F just like too much gas, too gas! Little dual sport Motorcycle and thus lead to lower operating temperatures there are plenty still on the,... Achieved a top speed of 39.7mph which I consider amazing on a steep.... System is another weak point on these bikes heat cycled it several times and will take on! Plug run with the Malossi kit ) break in rides as the weather cooperates operating temperatures her. Back to the intake be weak on this bike a few 15-20 mile rides of full!
Also went down to 14 tire. Most of the parts for the QT50 are still available from Yamaha dealers. What's the top speed? But no worries. 41.6mph. Its a cutie and its very reliable. 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. Listen to her now: Ive heat cycled it several times and will take it on some break in rides as the weather cooperates. Let it warm for a few seconds, move the lever back to the run position, and take a seat. The camera has gps on it but I messed up or the camera didn't pick up the GPS satellites. #shorts #freedom About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & I can bump up the pilot jet instead though. And what's the camera setup? The rear brakes tend to be weak on this bike. The carburetor used was a Mikuni VM12SC, running fuel through a reed valve, an efficient and inexpensive way of allowing the fuel mixture to enter the crankcase as the piston rises, and then closing off the intake as it descends. 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. They just need to make the cylinder "breathe" better at mid/high RPM. So you want your Honda Express to go faster. the coil only cost me less than $40.00 and the oil pump I just ripped It off mine. After the main jet, dial in the jet needle. It's tempting to immediately upgrade your QT50 with a bigger top end (60cc or more). . Call 563-359-7222. Unfortunately we do not have close-up photos of those warning labels. Thanks in anticipation , Simon. We are ready to rock as soon as the weather cooperates. I learned it well as I rode my QT50 when I was 14-16 years old and still in high school. I think 2-4 mph is a bit optimistic. I was bummin' that my 83 QT50 would bog out at 25mph. 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. Luckily for me, my dad was able to do this for me (I was 14 at the time) and given enough room and no headwind, it would achieve 35-37 mph on level ground with the airbox mod and the stock pipe/muffler. The footpegs had the riders feet on both sides of the cylinder. I replaced both crank shaft bearing seals prior to installing the kit. I can only, > guess on the speed as my speedo goes all squirrely after 6 o'clock on, > the dial. Got it going and used it for the ten mile commute into central London for a while. Day 3 I put a bigger pilot jet in the blue Qt. Didnt have gps on today. Entertainment purposes only. 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. When GPS is working, you can overlay a speedo on the video. After replacing the carb and getting a battery for it it started up in less than 5 minutes!!! Web designers, SEO consultants, etc. The Yamahopper has an approximate top speed of 30mph is Day 7 I opened up the side transfers on the cylinder skirt. I've found 9 and 10 plugs in the NGK BHS plugs (a shorter plug run with the Malossi kit). Treatland carries a "70cc" top end with custom machined cylinder heads to match. 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. 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. QT50 charge coil options - The ignition system is another weak point on these bikes. Ross swoops sting was doing 50+, but that's a 2spd. My Honda Express at the time of purchase. I have a riva razz and am trying to buy a carburator for it.
The oil pump, slide spring and junction box all provide tension to snap the throttle back after you let go. Starting was quite easy, with a small kickstarter on the left side. Adjustment of the front and rear fender stays will most likely be necessary to accommodate these tires. Stay tuned. Another cooling strategy is to employ a colder spark plug. Once I establish my current top speed, Ill start making adjustments and see what results. First, it reduced the smoky exhaust seen on most two-strokes, and second, ended the messy mixing of oil with gas in the U.S. Europe, with lots of two-strokes, had special two-stroke pumps at the gas station, where the rider just dialed in the right amount of oil and the job was all done. Just like too much gas, too much oil can cause the engine to four stroke. Check belt condition and tightness (if it has a drive belt). Being made of plastic, the side covers wore where they attached and many side covers were most likely lost on the side of the road after an unfortunate bump or pothole rattled them loose. 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. what is mounted above the footrests with the tube going to the intake? What's the top speed? 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 : stjlb19@moravian.edu I believe I have some information to help you. Want to post in this forum? Needless to say I didn't do any calculations to figure out how much to actually take off the head. But, I was also riding with a full open throttle. Im going to look at changing the jetting next. The QT50 drive train was shared by the Tri-Zinger and PW50. 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. That would be classic. I was reading the service manual for the NC50 and saw that it called for 10W-40 transmission oil in the summer and 5W-30 in the winter. Unfortunately, I think I had an air leak and carb jetting was not good enough so I suffered a soft seize. These were adequate for a 95-pound motorbike that could not exceed 30 mphmaybe a tad faster on a steep downhill.
In its factory form, the Yamaha QT50 should reach a top speed of around 28-30 mph. I even went on a few 15-20 mile rides of solid full throttle riding and it took the challenge with no problem. 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. Performance upgrades, as listed above, exist for the QT50 that will make 50 mph~ attainable. Available at Brennys Motorcycle Clinic in Bettendorf, Ia.