Our bike seems to be slipping when under load, it pulls away very slow and then on top end its revs out as if clutch is applied. The drive belt appears to be slipping although we have had a new one fitted. Does anyone have any ideas. To compound the problem we are travelling around europe in our motorhome, so language barrier is problem. We are currently in Spain.

Please help!!

Steve Cliff, October 2006

i had the same problem with my speedfight 2 50cc Air.
I added on a Leo Vince ZX Racing pipe and bought new clutch rollers.

Boothy, April 2007

hi! you probably have put on heavy rollers. try a combination of 3 (6g) and 3 (7g). But don't go with a difference of more than 2g because you will have two variying acceleration, one quick then top comes slow. you can also use smaller rollers but it has to have the same diameter as the original fitment to give you more ratio on the bottom end. check for any leaks in the gaskets of the barrel or any thing that may clog the ports (i.e. excexx gasket sealants)

kris urian, November 2006

i would suggest the wrong belt has been fitted or the variator rollers are jammed up to make it pull away slow but this would not make the clutch seem to be slipping rollers are common to twist on their sides and cause the gear ratio to be to high to get good acceleration ok.

adam bike doctor, October 2006