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Thread: gp1200 jetting

  1. #1

    gp1200 jetting

    What should the jets be set to on a gp1200 with flame arrestors and making 150 psi?? Also does this need to be running 93 octane?? It is also bored 1.0 mm over

  2. #2
    Yamaha artisan Cutlass's Avatar
    Join Date
    Oct 2010
    Madison, WI, USA
    I think this should work for you:
    100 pilots
    135 mains
    1.5 needles and seats
    115 gram springs

    It seems to be a common recommendation for a non ported, single pipe, stockish 65u with flame arrestors.

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