Hey, I used to ride a YZ80 many many years ago, and I loved it. I have only recently established that I can get enough money together to get a WR400. So with that in mind, my knowledge of engines and cars is reasonable but all the different technical terms with bikes has pretty much just left me stumped. From what I understand the mods to go for are: -remove baffle -remove airbox cover -change the cam timing -remove the throttle stop. My questions are: 1 - are these mods what I should do? 2 - what is a baffle? 3 - how much should the timing be changed, and should YZ400 cams be used? 4 - how is the throttle stop removed? Cheers guys, P.S If you know of any other articles that will get me a general understanding of terminology and other stuff, that would be great.