exhaust?

[Doug@J&D racing]

I put a full yoshi exhaust on my 05 450r the destructions said no jetting required but i've never put an exhaust on without jetting i live in michigan any input on jetting would be great thanks!

[UnderFire]

you sohuld definitely jet it.

[post450r]

i put on full yosh no jetting just like instrutions said ran good for a long time but recently removed airbox lid hrc needle 185 main now it runs pulls hard what i am getting at is open it up you wont be sorry