jetting
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do any of you guys out there have a 400ex w/ an HMF full system? What is your main jet size? I put a 180 in on mine and it was sputtering a little at full throttle and occasionally back firing when i let off the throttle. Does this mean i am running too rich or too lean. Should i go up or down on the jetting? What is the dynojet equivalent of a 180 Keihin jet?
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Originally posted by: cals400ex
try a Keihin 155 mainjet or around a 148 DJ.
if the bike is backfiring on deceleration, you need to turn your fuel screw out a little bit. try 1/2 turn or so for starters. if you need to go more than 1 full turn out, i would put in a larger slow jet.
try a Keihin 155 mainjet or around a 148 DJ.
if the bike is backfiring on deceleration, you need to turn your fuel screw out a little bit. try 1/2 turn or so for starters. if you need to go more than 1 full turn out, i would put in a larger slow jet.
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