compatability

My 04 FE 450 has just had bottom end failure and I've bought what I thought was a spare 450 (turns out is a 400) for dirt cheap. Can any of the 400 engine parts be used on the 450 to save on the cost of new? TIA :)

I have a chassis for a 02 470, and can get a frame and engine/electrics from a 06 650. will everything bolt up?? thanks, Edwin

I was wondering if an fmf slip on for a ktm 525 would work on my 06 650. Anybody tried this, i dont want to buy something that i cannot use but not many choices for bergs of this era.

Hey guys I am wanting to do an exhaust swap on my 2000 FC501 and am wondering which years and systems will fit the engine head. I would like to put a system off an 02 470 on it, so my question is, will this fit? I know I woul probably have to mess around with building some brackets for...