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  1. #1

    BlackJack 48mm Serie I S.F.I. mod or Super BN H.S.S.???

    Does the BlackJack 48mm S.F.I. mod on Mikuni I Series have the same gains of the Super BN H.S.S.???


  2. #2
    Moderator OsideBill's Avatar
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    The I body BlackJacks have no midrange they will jump from 4000 to over 6000 rpm with nothing in between. They hit hard and work great at WOT but the lack of a mid-range made cruising difficult. The SBN series is the only way to go on these IMO.

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