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View Full Version : I need some advice on jettin my honda 440ex



440 00
08-09-2007, 06:58 PM
i had put my bike back to stock to sell it has a 440 with 12.5.1 port and polished head stage 2 hot cam it still has all of that but now it has a stock cdi a stock carb and stock exhaust can anyone reccomend what size jets it needs to run.

honda300EXtreme
08-09-2007, 07:33 PM
i would start with a 160 and get a baseline,,, then bump up a size or two if neccessary, and also throw in a 42 pilot jet....

Wheelie
08-09-2007, 10:07 PM
42 Pilot and 165 main.

440 00
08-10-2007, 06:32 PM
any more suggestions?

440 00
08-10-2007, 09:20 PM
1 am leaning towards a 170-175 mj and 42 pilot

440 00
08-11-2007, 08:54 AM
matt from mobile dyno jst gave me some info he said i would be fine with the 38 pilot and with stock pipe the mj should be 160-165

cincy250R
08-11-2007, 10:00 AM
are you using the Keihin jets or the Dynojet jets???

-Dave