what does the pilot jet n a 400ex carb control & should i have put a main jet n instead of a pilot if its runnin lean

 

your pilot controls the start of your engine in most ways. for instance...if you wanted more HP out of your carb and atv, you could remove the choke. after so, it would have a time starting. so u put a bigger pilot in to fix that prob. cold or hot it will fire right up.

now if your to lean, you need a bigger jet. 146-148 is stock. get a fmf jet kit and try all the diffrent jets. stock bike with pipe try a 150-155. rebuild aith pipe, try 175-180, and so on.

hope this helps...

 

thanks , ill give it a try

 

me & my brother both had one and his choke was removed , mayb thats why he had alot more on the bottom end