How fast is your Schwinn OCC

[trson]

My 80cc bgf Schwinn OCC with a 44t sprocket goes to around 15mph. At wot it sounds crazier but it feels like it doesnt speed up at all.

[Youngbird]

Man....seems like you should be able to crack the "25 Barrier" anyway. Whats wrong?

[trson]

I don't know. I upgraded to hp spark plug wire and cap from sickbikeparts, and it improved a little. I used directhit, which works better in the winter, but I could not get to 20mph. The Directhit makes the engine sounds very crazy in the summer.

[Youngbird]

What size rear sprocket do you have?

[trson]

Should 44t Schwinn OCC go to 20mph?

[Youngbird]

If everything is working right I would think you should be able to hit 30mph easy, unless of course you weigh in at 500 or so lbs. I dont see why you cant get any speed.

[Retmachinist]

With the 20 inch tires you will probably need more like a 36 tooth sprocket to get above 20 m.p.h.

John

[Cabinfever1977]

the problem is your small wheels. you dont want to use a 44t with anything smaller than 26" wheels.with my 26" wheels and 44t im getting 32mph. Youre only going to get 15-18mph. you need to get a smaller sprocket to make up for the smaller wheel.to get the same speed with your 20's you would need a 27T sprocket.but you could use a 32,34,36 to get 20mph or so.

the larger wheels travel more distance in less time and are more faster
the smaller wheels have to spin more times to travel the same distance and are slower

[trson]

Since I am living in high altitude in Denver, I believe that my engine is running weak because of thin air. Right now I have an controllable air tube attaching to the opening on the intake where the boost bottle tube is supposed to be. The engine now runs better (a little more power with more mpg) but it is harder to start and not able to idle at all when the clutch is pulled.

[Bikeguy Joe]

Yeah with that controllable air tube, it's just running leaner, and that's not healthy.

You need a 27T sprocket or you will just be revving it to the moon and getting no speed with 20" wheels.