quick z400 jetting

[fmftrx300ex]

2003 z400 stock main jet is a 130 it has a motoworks slip on runs good alittle lean on the low end (new piolet jet and some fidling required.) im soon gunna put a uni ,best filters known to man!, on and put a few holes in the lid so it can breath easy any idea where i should start 135? 137? 140? thanks for any help

,john spillane

[Tyler01]

Maybe www.Rockymountainatv.com and look on there?

[fmftrx300ex]

i have no problem getting the jets i want an idea wht main jet i should start with with an airfilter, holes in the airbox, and a motoworks slip on again thanks for any help

[fmftrx300ex]

any one know anything about z400s come on ppl ,

[LPR]

First I would up one pilot size, or drill out the little brass plug and access the fuel screw. Richening up the pilot circuit will help with starting, and actually affects the jetting elsewhere.

Get 150 through 160 mains. Start at the top and work your way down, I usually go with the richest main that does not have that "rich hesitation" when WOT.
You an also mess with your needle to richen it up a little, if need be.

Also this is just ballpark, no two bikes are the same, you will need to experiment, so you should get a few new plugs and start messing around! Good luck.

[fmftrx300ex]

thanks yea iv jetted quite a few bikes and quads now so imconfident in it just needed an idea where to start