I'm running '72 top end internals in a '69 case, and on the basis that I'm using rockers/camshaft/cam sprocket/end caps and so on from the newer bike, I assume everything should be fine (the outer case is essentially the same for both models).
However, having adjusted the clearances and cam chain tension and balanced the carbs as best I can, the top end sounds more noisy than it used to when I was using the original cam/rockers. I know the cam design of the later models makes them more peaky, but I'm not sure whether that would change the sound from the top end.
So 2 questions - are the valve clearances the same between the models and are the clearances quoted in the book the optimum settings or (as they are in the 750 Haynes manual) the maximum settings?
Thanks in advance.