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Thread: Piston Size

  1. #1
    Join Date
    May 2006
    Location
    cornwall ny
    Posts
    198

    Piston Size

    if i put a 0.60 over piston in my 400 ex what would that make it........ sorry for the stupid questions
    '02 400ex
    UNI*w/ big gunn s/o
    *main 165 42pilot out 1.5 turn, needle 4th spot from top
    *stage 2 hot cam
    *bored to a 407 with high comp piston
    *+2 full flight a-arms
    *450r front shocks

  2. #2
    Join Date
    Oct 2001
    Location
    Indianola Iowa
    Posts
    9,242
    .60 calculated to a 1.5mm over
    .40 is a 406
    .80 is a 416
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