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400eXr1d3rZ
07-13-2006, 07:49 PM
What keihin jets should I get, i have a 2002 400ex with White brothers e-series SLIP ON and UNI airfilter, im gonna drill a few holes in the airbox in random places, how many should I drill, and what size? thanks.
Wheelie
07-14-2006, 07:00 AM
Personally I would cut one 2.5 in to 3.5 in hole in the airbox lid, or remove it entirely.

Jetting: 40pilot, 152 or 155 main, lower clip on the needle one notch.
ohsobad_chevy
07-14-2006, 09:38 AM
Dont drill holes in the lid, take it off completely!!
Pilot: 42, Main: 155, Needle pos: 2nd pos down from the top, Screw: all the way in and 2.5 turns out. Keep in mind your elevation as well as riding temp will affect jetting. :)
400eXr1d3rZ
07-15-2006, 04:24 PM
Well i dont want to take my lid completly off becuase sometimes i ride in mud, lots of mud and really sandy areas. Does UNI make outwears? If they do then im gonna get it and take the lid off, that would make me feel safer.
ohsobad_chevy
07-17-2006, 07:53 AM
Originally posted by 400eXr1d3rZ
Well i dont want to take my lid completly off becuase sometimes i ride in mud, lots of mud and really sandy areas. Does UNI make outwears? If they do then im gonna get it and take the lid off, that would make me feel safer.
If you drill holes in your airbox, the mud will still get in there. Trust me man, just take it all the way off, keep it clean and oiled good, you wont have a problem.