scooter is slower than I think its suppose to be

[wingnut82]

I have a jonway wasp and a honda metro and the honda metro out runs the wasp on take off and top end. The Wasp is only going about 38mph at the most and i think it should be doing over 40mph. i dont know wether its the rear wheel bearing needs grease or transmission issue or maybe even a exhaust issue. Any ideas?

[lbo]

How's your tire pressure?

[zacio]

Once on my Keeway Matrix the main bolt on the rear wheel got loose and the wheel itself couldn't rev linear and I couldn't get top speed, then I got it fixed and it ran as it should be. Maybe that's your problem, maybe not. Check it anyways.
Cheers

[90GTVert]

What makes you think it's a bearing issue... or is that just a wild guess?

[wingnut82]

Just thinking of possiblites of power loss but i spun the wheel last night and it seemed ok. I spun it the other day and it didnt seem to spin as good.

[90GTVert]

Have you checked for a restrictor washer in the variator? I tell about that at roughly 3:30 in the vid below. If you aren't used to CVTs and need more info, check the whole vid out and it'll show you anything you should need to know about service and inspection of your CVT.

[reveeen]

I *think* Brent, that we need some kind of history here. I am almost sure we all *think* our scooters are slow, otherwise why would we be improving them.....

It's all well, and fine, coming out and saying: "my scooter is slow", but without any details beyond that all you are going to get is a lot of guesses, most of them nothing to do with your situation.

[90GTVert]

True reveeen. Mine's just an idea that is reasonably common and sometimes drops a few MPH. In reality the avg rider won't see much over 40MPH on a stock 1E40QMB scooter. Some are slower than that stock. Gearing varies, jetting varies, overall quality varies. With a Honda you are getting something that has excellent design and quality control. With a Chinese scoot you can never be 100% sure of what you are getting beyond the basics.

So, has it ever been faster or you just feel like it should be faster than the 4T metro?

[wingnut82]

thanks for the video i will try the washer removal. This scooter has been slower than the honda but i bought this scooter used. I top out at 38 mph if everything is running good. I am trying to tune a 19mm carb i am putting on it now and i hope when i get some new jets it will run better.

[reveeen]

The prudent thing is to start with a tune-up: new spark plug, compression test, verify TDC, check rollers and belt, check fuel and vacuum lines, check fuel filter and carb bowl, inspect tires and pressure, check wheel bearings and steering head bearings.

[wingnut82]

I looked for restrictions on this scooter and couldnt find any. No exhaust restriction i can see and now washer on variator. I have a 19mm carb what size jet should I have in it with every thing stock other than unlimited cdi?

[90GTVert]

When I did one of my projects I noted that going to 19mm vs the stock carb required only a small step in jet change with all other components the same. If your spark plug looked good after some miles with the stock setup, maybe just see what jet was in the stocker and go up 5% as a starting point if it's labeled. If not, start off around 80 I guess. I dunno, I tune everything and I suggest everyone does the same. Any suggestions are only a ballpark starting point and you should never just slap a jet in and assume it's fine IMO. If you have any doubt, err toward rich to be safe.

[skuttadawg]

I have a Jonway Magnum 2T with a 19mm TK carb and a 75 jet . Stock was 6x . Unsure of exact size but was in the 60s . Washer removed along with fuel line and fuel filter replaced with automotive tubing and a NGK iridium . I bought an unlimited cdi but it made not a single difference as I still could only hit 8,000 , sometimes 8,500 and it would stall and sputter at 9,000 downhill like it was restricted . I have a pipe with expansion chamber and muffler curved forward like most after market pipes , except it has a reed valve and hose going to the air box . I went to my dealer and asked WTF with the cdi I got there . He said maybe the weights were too heavy for high rpms . Took out the stock ones and weighed them and were 6 grams . Tried 4 grams I over revved and went slower with rpm limit . I mixed up 4s and 6s to equal 5 and its ok . I am geared low and might change out the gears after a BBK . I weigh 200 lbs and can easily hit 45 mph , 50 most of the time and 55 3 times on level ground and 55mph downhill and limitation steps in . It runs perfect just a hair on the rich side , be careful to rich can have more gas than oil and not keep the rings lubed . Stock pipes have a catalytic convertor in them where most after market do not . THANKS to 90GTVert with the 2T Pipe database I read where most stock pipes have a 8,500 limit , midranges around 11,000 but stock crank should never go above 10,000 rpms .

I did a hard break in and even rode to another county the first day I bought it . I had so much fun I ran out of gas and laughed . I have not ran out of gas in 20 years . Run premium gas and premium 2T oil like Belray MC1 . I used semi synthetic untill 1,000 miles then switched to full synthetic . Never but in weedeater grade 2T oil as performance not as good , smokes way more and more likely to foul out the sparkplug.

2Ts are by far more fun to ride and tune . To truly get more power get a 47.6mm or 72cc BBK and a decent pipe or even better a power kit like this eshop.mainelyscooters.com/product/cat-1p40qmb/hoca-minarelli-2t-power-pack/ and enjoy .

Now can can spend a few grand quick with high end Italian racing parts but even a modest power kit will make you smile