cowentz
06-19-2007, 07:07 PM
Lets start with what I have: 01 400ex, 11:1 weisco std bore, stage 1 hot cam, aftermarket rev box, uni filter w/ lid on, and DG full exhaust.
I just rebuilt the motor this winter with the piston, cam, and put the rev box on. I checked the jetting today to find out it is a 38 pilot jet, and the main has 146 stampped on it. The service manual says stock is a 148. I am not sure why the guy went down a jet size when putting a pipe and filter on. The main jet is round is this a stock kehin jet or is it maybe a dynojet??
Where should I start with the jetting? I am at around 500f - 1000 f elevation with normal riding at 70 - 90 deg. I was thinking a 160 main and a 40 pilot. Also will I need to move the needle? Thanks for any help
I just rebuilt the motor this winter with the piston, cam, and put the rev box on. I checked the jetting today to find out it is a 38 pilot jet, and the main has 146 stampped on it. The service manual says stock is a 148. I am not sure why the guy went down a jet size when putting a pipe and filter on. The main jet is round is this a stock kehin jet or is it maybe a dynojet??
Where should I start with the jetting? I am at around 500f - 1000 f elevation with normal riding at 70 - 90 deg. I was thinking a 160 main and a 40 pilot. Also will I need to move the needle? Thanks for any help