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  1. Engine/EFI/Drivetrain
    Hi everyone, I'm new here and I have a few questions regarding my 400ex. I bought it and it was already bored to a 440, I prefer the 416, but it's fine. Bought it anyways, ran good, and then I blew it up. Something made my intake valves go through the piston. No big deal right? Wrong. I got new...
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