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engine rebuild

  1. Wanted / Needed
    Bottom end on my 04 440ex blew apart this morning :mad:. Just want to run with a 05 or newer engine prefer complete with reverse cable if someone has a good one to get rid of hit me up.:cool:
  2. Engine/EFI/Drivetrain
    Ok so I'm considering building up the motor in my 2005 trx250ex. I want to bore it, new high compresion piston, cams, head work, ect ect.... My question is has anyone built one of these motors and what kind of mods/sucess have you had. Basicly is this worth it, what can i expect, and any tips...
  3. Engine/EFI/Drivetrain
    I have a stock 400ex and I would like it to perform stronger. Can anyone advice me as to what I should do to the engine. My son races Hare scrambles so engine temp is a continous concern with the mud etc.. My intent is to rebuild the engine over the winter months. Any advice you can give would...