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  1. How Big of Bore Can I Go???

    Honda TRX
    I have an 1988 or 9 trx 250r cylinder head jug, its been ported and, ETC But anyway the piston says 3.50 on the top, and the jug is in need of a bore.i know that this way be pushin the limit, but i was wondering how much more can i bore it out to,, WITHOUT re sleeving. THANKS.
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