I'm thinking it might be time for a head rebuild, for maintenence purposes, on my '00 426. I just bought it this spring with a bad big end bearing, rebuilt it, the bike runs great and I love it (first 426). I can't remember right off hand what the I shimmed the valves to, but they were low (thin pads), nothing over .65 on either side. I will have to check tonight. I want to freshen up the head, nothing crazy, just an OEM makeover. I have done everything else in an engine but nothing past shimming in a head. My questions are: 1) What parts do I order? (need to be replaced) 2) How much can I do myself? (wouldn't mind investing in some special tools, very mechanically inclined and eager to learn the head) 3) What all needs to be done for a maintenece rebuild? Not looking for a walkthrought, just an overview.