It's probably been said but I couldn't find any links.(alright I couldn't be arsed - just spen all al fitting a cluth in my Dads Triumph Vitesse).
I took my '76 750 F1 out for a thrash ready for it's MOT but I can't get the engine over 5000 in top, you can feel it trying to pull but no joy. I know someone will say "sync those carbs" and I have sunk 'em any other ideas.