Firstly, hello and thanks. I've had a 1978 CB550 F1 for just over 3 weeks now. I live in France and bought it off a guy in Toulouse who had had it 10 years and spent a small fortune on it. The 3 1/2 hour ride from Toulouse to my home in the Lot et Garonne was great and a good introduction to the bike. Only problems were 1) difficultly in changing gear (solved by putting some free play in the system and after scouring this web site for tips- hence the thanks and 2) a badly flickering tachometer thats swing up and down a few thousand revs at a time. Any ideas on how to solve this greatly appreciated please.