Originally Posted by cannonball2
This one is using the Grubee G4 with the HS 4stroke. I have been all through the Grubee unit every thing is in order there, the belt is tight and not slipping, all keys are good, and the problematic Grubee freewheel has been welded. Cant imagine the rear freewheel is bad but cant think of anything elsended to me. Only one way to find out.
This has happend to me also.While I was testing the 4 stroke shift kit for SBP my engine would rev up for a second and then back to normal.I talked to Jim at SBP and his was doing the same.I know it doesn't solve the problem...but your not alone.If it was constant I would look further into it but I believe it is just in the motor and not really a problem.