Hey Gents I have a 86 1100-G punched (1220cc) heads portted and polished. I did not do any of this work my self the previous owner did. however my problem is when I give my bike a run 70 mph or more I feel vibration around from the tranny. It seems to stay even when I slow down. Is this normal? It has done this since I got it but Today it is real noticable. It's nowhere near close to being due for a oil change. The oil is between the F and L on the lil window. Any help will be appreciated.