last year i installed my rebuilt b18b has been running great but now i have a vibration at 3400-3500 in any gear and when free revving installed old clutch(act stage4 solid hub)that has been abused.there were some chips missing from a couple of the pucks and friction disk was pretty scarred and grooved.do you think a one of the pucks could have come apart causing an imbalance? does not slip and has the same usual chatter....
thanks

 

well if one of the pucks came off you could pop off the flywheel cover and look for it inside, but this is probably not the case
any particular noises around that rpm like rattles, squeaks, etc?

 

The only rattles, squeaks, associated are the ones caused by the vibration in the body no engine,transmission,clutch noise