My son has a speedfight 2 and recently the drive belt broke which I have replaced. I couldn't get the nut off the variator so took the clutch off instead to get the new drive belt on. The problem is that the rear wheel goes round (ie the clutch engages) at tick over speed and the bike will not accelerate when off the stand - it accelerates no problem on the stand and the rear wheel is driven at all revs. I have looked at the position of the belt with the engine off - on the variator the belt is at the outside of the variator (which is making a horrible noise when the engine is running). On the driven pulley (clutch) the belt is very near the inside of the pulley. I have a suspicion that maybe the rollers have stuck and are holding the belt on the outside of the drive pulley which means the driven pulley is turning too fast even at tickover and therefor engaging the clutch and turning the back wheel at low revs.
Any help or advice would be very much appreciated?

Dave, March 2007

hi there would some one help me my speedfight 2 when i am going at speed my bike is variating all the time

lee, May 2012

Thanks Scorpion - it was just as you said - the rollers had flattened and were stuck as if the bike was going at speed - bought some new rollers (£13) and problem solved - bike going the best its ever done

Cheers

Dave, April 2007

I had that problem with my speedfight 2 going up hill when the drive belt broke and the part where your saying about putting a new belt on it should work well i found out on mine that three clips near the rollers had snapped which means the bike wont move when its off its stand(it holds on to the rollers until there is force to push them out). To get mine fixed my local peugeot dealer replaced them and it cost me about £30 im sorry i cant say exactly what the part or name is but that fixed mine. i hope you do get it working as speedfights 2 are a nice bike :D.

Scorpion, March 2007