do i need to jet again after putting full exhaust system when i had slip on?

[anabolicsman]

i have a 01 400ex and it was jetted for a yoshimura slip on ,now i just bought the yoshimura full exhaust do i need to jet again? if so what size jet?

[CarGuy7a]

it should be pretty close if it's the same brand exhaust. maybe a minor adjustment like the needle you might try.

i would run it and see what it runs like b4 changing anything.

[krt400ex]

what jetting you running now? i got a 155 main, 42 pilot, 2 1/4 turns out on the fuel screw, and no airbox lid with my yosh full system...runs great.


BTW, im using OEM brand jets