Sprockets small chain sprocket dimensions

Discussion in 'Transmission / Drivetrain' started by joey1965, Mar 14, 2011.

  1. joey1965

    joey1965 New Member

    im putting a mini bike x7 engine on my bike and i have everything i need but my big problem is i need to change the countershaft sprocket on the transmission(that turns the chain) to a sprocket that will be able to use the heavy duty bicycle chains. now the reason i cant just buy a small chain sprocket and put it in is that the shaft is shaped like this;
    _-_-_-_ but as a circular shaft.
    so what i can do is cut the teeth off and kep the part that slides onto the shaft and weld a sprocket around it. the only problem is i need a sprocket that can use the bike chain and has a hole that is .875 inches in diameter. ive searched everywhere for this but i cant find it. can anyone please help me!?!?! D:

    also could someone tell me the inside diameter of the small chain sprocket sold on most motorized site that looks like this?

  2. Wheres my dog

    Wheres my dog New Member

    I think that .875" shaft is going to be the killer for you.... short of welding on a sprocket, you may be out of luck here

    The easier way to go may be to leave it alone and run it to a jackshaft with a sprocket the same pitch, and on the jackshaft have a #41 pitch sprocket running to the rear wheel

    I am in the same boat as you with trying to find a 6 spline sprocket for my transmission, and absolutely can not find one anywhere... my last resort is running a jackshaft
  3. joey1965

    joey1965 New Member

    true, but if i weld it on i need to find a sprocket that will fit the bike chain but have a hole with a diameter of 1/2 inch

    ur right, i cant find anywhere with a sproket that side with a 7/8(.875) inch hole
  4. 5-7HEAVEN

    5-7HEAVEN Guest

    Last edited by a moderator: Mar 16, 2011