PDA

View Full Version : jetting 406



exboy400
08-22-2003, 08:00 AM
i have a completely stock 400ex but i had to bore it .40 over to a 406 because i got some pretty deep scratches in the cylinder. i am now running an 11:1 wiseco piston with everything else stock and i didnt know if i had to change the pilot jet, needle setting, and main jet or if i just have to change the main jet and to what size so if anyone can tell me what to change and even what to change it to that would be great. thanks.

Pappy
08-22-2003, 08:30 AM
stock pipe with full airbox and lid or even a pipe with full airbox should be a 152

if the lid is removed a 155 could be the ticket


start a bit bigger and work down....u dont wanna burn this one up:p

exboy400
08-22-2003, 11:26 AM
thanks........i'll try not to.