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Thread: Black insulator on restrictor plate class

  1. #1
    4 Cycle Member
    Join Date
    Jan 2016
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    16

    Black insulator on restrictor plate class

    What does the rule book say about the black insulator on restrictor plate motors and non restrictor plate motors

  2. #2
    4 Cycle Advanced User Dover Power's Avatar
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    Oct 2013
    Location
    Concord NC
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    1,761
    Minimum thickness,, no rifleing,,angleing,dimpleing.. Basically a straight enlarging of the hole is allowed..
    Dover Power
    The Carolina Original Since 1972
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