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Another jetting ?
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Posted by: xveryx

ok got a 2007 400ex and i got a hmf slip on. Temp averages around here now from 70 to 95 and its pretty humid.Air box cover is on and everything else is stock. So what main jet will i need and where can i order a 2004 400ex needle for it?

Posted by: xveryx

oh i forgot elevation is about sea lvl

Posted by: xveryx

one more thing. I ordered some extra main jets and a jet pilot from jetsrus.Sizes 152 and 155 and got a 165 that came with hmf slip on and a 42 pilot. Now the pilot has the official keihin stamp on it but the main jets dont like it does on the pilot i ordered and the stock main jet already n carb. Are those official keihin jets i got from jetsrus or did they send me some cheaper made ones cause they dont have the stamp on it like my main jet n carb already?

Posted by: honda300EXtreme

i would start with the 155 main and put in the 42 pilot and fine tune it from there... if its too rich then drop down to a 152

i dont know what jets r us sent you, they should be keihin

Posted by: xveryx

Seems kinda fishy to me that the main jets they sent me dont have the keihin stamp on it like the pilot and the stock main jet already n the carb.

Posted by: honda300EXtreme

i hear ya, ive never seen a keihin jet with out the stamp..

but as long as it gets the job done.....

Posted by: xveryx

What about the 2004 ex adjustable needle. Wheres a good place to order one?

Posted by: honda300EXtreme

not sure about the needle

Maybe service honda or shoot colby a pm he can find about anything...