Originally Posted by jasonh
Well here are some of the things Chris Hill mentions doing on his kits. Might be a good starting point (might be hard to find the stuff too, lol)
(including NGK plugs), Japanese mains, double walled seals with spring retainers, and high quality German bearings..
I think the things you mentioned are what I'm looking for. I really feel we need to make a source guide for these. I wouldn't know where to look for German bearings, or even what part they replace?