R100rs 1979

[juliandelaney]

I've just replaced the bottom end on my bike due to big end wear (or poor maintenance on my behalf)
After a few problems on the initial shake down I was quite pleased the the way it ran. Unfortunatley on the third trip out, I felt an twing at the rear end, I first thought it has slipped out of gear, (I also considered the centre stand spring failing and dragging as this was how it felt.) I have checked all the gear linkage, rechecked the drive shaft bolts and stub axles and driven it again.
Last time out I was quite gentle with the acceleration and very positive with the gear changes and all seemed well until I was nearley home when I gave it a bit more throttle and again a nasty faulter in the power delivery.
My thoughts suggest a worn gearbox, but considering all the items I have disturbed, it seems very unfortunate that the 'box should develope a fault right now.
I think the ignition timing is a little advanced, could this cause a problem like this ??
I would appreciate any suggestions.

Julian Delaney