Hey all, new to the forum and new to the thumper world. I've ridden 2 strokes since i was 6, but a friend was ditching one of his bikes and after some research i picked up an '00 yz426 for a grand. He was told the bike was a former factory race bike, not that I believe it but it does have oodles of aftermarket stuff. I rode the bike last presidents day weekend (this ride is what led me to thumpers) and the thing is a beast, I was sold. So now I have a bike that I don't know the maintenace history on, and have never dealt with a 4 stroke before. What should I have checked, obviously oil, filters, plug, etc will be changed. The bike runs (does not like starting or idling anymore, but has been sitting since presidents day so I know a carb clean is in order) and rides nicely. Do thumpers need top end rebuilds as often as 2 strokes? What needs to be checked in that top end? Any input you guys have would be great, as well as any suggested mods to use or avoid. Thanks!