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  1. 2003 Honda 400ex decompressor

    Maintenance / Important Information
    Hi every one, I just bought a 2003 400EX bored to 426 and notice that it’s missing the decompressor lobe on the camshaft. I was wandering if it would still start or I need to buy the lobe. Thanks in advance!! Also, what main jet should I be running? The engine is bored to 426 like I said, it got...
  2. New guy here

    New Member Introductions
    Getting on here in hopes of finding someone to buy some new trx450r engine parts I have. They are new in original packaging. Honda top end gasket set Hot cams stage 3 Weisco high compression piston kit Will fit kick start and electric start. Also crosses over to CRF 450r
  3. new cam question, 91 Trx250x

    Engine/EFI/Drivetrain
    My buddy ordered me a cam cause he owed me some money and thats one of the things I needed for my 250 project, he ended up getting one made by a company called "factory spec" couldnt find any reviews online, trying to see if anyone here has used a cam from factory spec before and if it was...
  4. 400ex wont start

    Engine/EFI/Drivetrain
    I have a 2001 400ex that would not run at all, then i had the valves adjusted and then when it would run there was a little bit of a knocking sound, but someone told me it was normal for 400ex's so i took it out and the timing chain broke instantly. Then i ordered a new timing chain and sprocket...
  5. changing my cam

    Engine/EFI/Drivetrain
    Does anyone know the procedure to changing a cam on my '04 400ex. Thank you Jesse
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