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yfz 450 jettingThis is a discussion on yfz 450 jetting within the ATV/UTV - Yamaha forum, part of the ATV/UTV Forums category; hi guys, i know this is everybodys fav. topic, but i have an 04 YFZ, all out motor, ported polished ... |
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#1
08-08-2009, 07:33 PM
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 yfz 450 jetting hi guys, i know this is everybodys fav. topic, but i have an 04 YFZ, all out motor, ported polished etc. But i can not figure out jetting..I live in NY and have a 175 main, 45 pilot, wertz accel pump, NCVQ needle 4th slot, 35 leak jet..when i stab the throttle it cuts out real bad and sometimes dies if you stab it quick enough, plus backfiring..im not sure where to go next  ..Thanks  |
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