Hello, you may be just the man. I’ve just re-built a V50 mk11 after doing a big end. It’s up and running but won’t go over 4K RPM. I’ve changed everything electrical and a set of carbs but no joy. I’ve spent so much time on this motor and still back to square one, and I’m getting well pee-ed off with it now. It will turn out to be something so bloody simple but I can’t see it, having spent so many hours ponceing about with it I’ve nearly lost the will to live. A mystery prize to the man ( or Woman ) who can solve the problem…