Sprockets Shim behind engine sprocket

Discussion in 'Transmission / Drivetrain' started by jdfast, Jul 13, 2010.

  1. jdfast

    jdfast New Member

    I have an regular 80cc motor on a beach cruiser with 26x2.125 tires. The chain touches the tires slightly. I know I could use a smaller tire, but the beach cruiser looks ridiculous with thin 26x1.75 tires. I've already moved the wheel sprocket as far out as possible without causing the chain to jump off. If I remove the motor sprocket, is it possible to put a 3 or 4 mm shim behind it so that the sprocket is far enough out to avoid touching the tire?

  2. professor

    professor Active Member

    Hi Jd welcome to Motoredbikes. I can't answer your question, but you could take the cover off and see if there is room.
  3. wheelbender6

    wheelbender6 Well-Known Member

    Welcome to the forum. The best solution is to use offset mounts on your motor (plenty of posts here on how to make some yourself and some of our sponsors offer them too).
    Shimming behind your drive sprocket will put extra stress on your cross shaft bearings, but they are not that difficult to replace.
    Give the shims a try unless you want to remount your engine.
  4. jdfast

    jdfast New Member

    Thanks for the info; good advice.