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  1. #1
    PolarisNut's Avatar
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    Weights of 1300 pistons

    Does anyone know the approximate weight of the various 1300 pistons, either with or without rings? Wiesco, OEM, ProX? I have one here and it is actually lighter than an OEM 66v piston, which seems strange. Was going to run a Wiseco taper wall wrist pin to get the weight down to 1200 levels, but it doesn't look like it's going to be necessary. Thanks


  2. #2
    Moderator RX951's Avatar
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    I bet WFO, Hydrotoys, OsideBill, Beerdart, Fercho, Woody or Lowell will know.....

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    WATER WOODY's Avatar
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    60T piston OEM
    rings
    wrist pin
    wrist pin bearing
    clips
    540 grams+/-

  4. #4
    PolarisNut's Avatar
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    Thanks Kevin

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    WATER WOODY's Avatar
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    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by WATER WOODY View Post
    60T piston OEM
    rings
    wrist pin
    wrist pin bearing
    clips
    540 grams+/-
    I have a brand new ProX 1300 piston w/rings, clips, and pin

    509 grams

  7. #7
    so with the less reciprocating mass of the Pro X`s does this means faster acceleration rate?

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    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by Pale Rider View Post
    so with the less reciprocating mass of the Pro X`s does this means faster acceleration rate?
    in theory, yes

  9. #9
    PolarisNut's Avatar
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    Woody's also included the bearing, so that could account for the 30g difference. I don't have one here to check.

    A stock 66V piston w/ clips, rings, and pin weighs 509gs. The pin alone weighs 105gs.

    I see Wiseco uses a shorter 63.5mm pin (vs the OEM 68mm) in their 84mm piston, which weighs only 70gs. If the pistons are the Pro Lite versions, I bet the whole assembly is quite a bit lighter than stock.

  10. #10
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by WFO View Post
    I have a brand new ProX 1300 piston w/rings, clips, and pin

    509 grams
    oem brg weighs 23grams

    so 532 grams total

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