Have just got hold of a CB650 and got it working, after passing its MOT i took it out to give it a good run out. Ended up on a motorway where i was overtaken by a artic lorry. my bike bearly does 70mph down hill. i belive it has been restricted and heard it could be washers in the tail pipe or in the carbs.
if anyone knows how to derestrict this bike can they explain how it would be much appreciated.