Quote:
Originally Posted by choneofakind
Thanks, it's a bit of a classic at this point.
Main jet: 112
Needles: 2 washers
Idle jet: 38
Mix screws: 2.5 turns
It previously had a 110 main jet, but it felt a little dull at the top end.
It's a 2mm over bore newgen engine with high compression pistons, an opened airbox lid, and a tyga exhaust.
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Your main jet might be spot-on with your overbore. I'm running 110s on a box stock 250 (Yoshimura slip-ons) and I'm happy with it. I can pull an indicated 100 M.P.H. in 6th with 15/42 gearing at 10K. I haven't had a need to touch any other jetting.
Bill