T-4 jetting

[zlam27]

hey, i was wondering what kind of jetting i would run with a K&N, open airbox (no lid), and a pro circuit T-4 pipe. i live at about 750ft above sea-level.

what is stock jetting? 38 pilot and 150 main?

zach

also, how much does removing the airbox lid affect jetting?

[bpimpdaddy21]

Might want to try my jetting, I have some of the same mods as you, and it runs awesome. (See sig)

Stock jetting is 38 Pilot and 148 Main

Removing the airbox lid affects the jetting a bit, it causes the machine to be lean if you dont change the jetting, you may have to go up like 2 jets for open airbox on the main, and maybe up one on the pilot and needle clip. But my jetting is for the lid off. With the lid on I ran 40 Pilot, 155 Main, and needle 3rd clip (Stock).

[zlam27]

that sound about right to everyone? is grinding the header welds worth anything? will i need new gaskets or anything? hmmm...

[zlam27]

anyone else have an opinion?

[cals400ex]

i say that jetting sounds really good. you could even go to a 42 pilot if you wish. also, i noticed my bike would not miss or hesitate in winter with the needle moved down one notch. the 155 main jet should be about perfect.