Got a 44 tooth sprocket.. but ..

[nomad69]

I'm getting 20/22 mph with the 44 tooth on a 49 cc china girl, I want to go faster, what size sprocket should I use?
TIA

 

[BobbyT]

You should be able to go faster even with a 44 sprocket. Have you got any 4 stroking? If so you won't be able to pull a smaller sprocket.

 

[crassius]

yeah, unless your weight is really high, you're not getting the right performance

 

[Potato_In_Exhaust]

Aren't you the guy that almost got an aneurysm because you had trouble tuning your carburetor to run right? I think that is your problem, a stock motor can push you to 30 mph, but I remember reading your other thread you said you were over 200 pounds? Even still at that weight, I think you should be going faster than just 20 mph. I don't weight nearly as much, but you know how they sometimes have an electronic board near a school that shows you how fast you are running through a school zone? I wasn't even going full throttle and it was showing 28 mph........ and don't worry, school was out.

I think the problem lies in your tuning.

 

[StevenMain]

I had gotten 42.5 mph on a highly modded motor with 44t once. 10k rpms. Stock should run about 28

 

[nomad69]

never mind..

 

[bairdco]

49cc's are slower anyway. Even tuned properly with a 44t, you're lucky to hit 30.

This has all been covered multiple times, so here's the short version.

Smaller the sprocket, the faster top speed, by sacrificing low end torque.

Heavy bike + heavy rider= slower speed.

Stock engine torque + smaller sprocket = pedaling uphill.

Smaller sprocket size is relative to what the bike can pull. Experimentation is required.