markyr6

ah ok sorry where am i now haha

got a yb100 that when it is in fourth gear seems to miss a beat like the clutch is slipping but clutch has been apart and is ok.new plug points and plug cap even adjusted points with dial gauge on just before tdc.check all wiring incase it was shorting out all ok.it is just a split second miss.you ride in third gear to as fast as it can go and all is fine.anybdy any more ideas or am i going to strip engine to see if fourth gear has tooth missing???

have you checked oil level in window? do you do lots of short runs could be emulsifing when engine breaths then parked on side stand it runs out?