Does anyone know what the stock pilot jet is on the 400ex

[Rob440EX]

Does anyone know what the stock pilot jet is on the 400ex?.....


thanks for your time.

[redroost85]

I believe that the stock pilot is a 38 on a 400. The most common changeouts are to a 40 or 42...which is what I put on mine.

One of the resident experts will surely correct me if I am wrong here, lol!:p

[Florida400EX]

pro circuit told me that with my full pro circuit pipe, twin air air filter, and no airbox lid to run a 158 main, and a 58 pilot. thats a HUGE change from stock i know that....

[cals400ex]

your correct, the stock pilot jet is a 38.

[Chef]

Originally posted by cals400ex
your correct, the stock pilot jet is a 38.

58? Holy hell, I only have a 52 in my 465!!