I owe you so much digger, I should have done this first, but I just watched about 10 YouTube videos of cb750 and they all seem to have the same rattle as mine does, some not as bad and some seem worse, must just be a design of the engine, makes me feel a lot better, and I might have been exaggerating about the cam adjuster movement it might have been about an 1/16 to an 1/8 inch, if what you hear doesn't sound too bad as all the bikes I watched on YouTube made the same noise isn't bad I think I will run it, I live in South Texas so riding is about an everyday thing, sorry for all the newb questions, the last old bike I had was a 73 Suzuki gt750, I wish I still had that bike was run and sounded like a big chainsaw running down the road. A cb750 has always been the bike I've wanted as my dad has had a few and always talked about how good they were and that he never had any issues with them. So I'm hoping to have mine road ready in a couple of months, this will never be restored it will always be a toy, I have a 71 cb750 that will possibly get restored some day. But I like to go fast id love to have a cb750 that makes about 90 rwhp but I know that isn't the easiest thing to do with a naturally aspirated cb750 but maybe one day.