05 450r

[quad]

I have a stock 05 450r with a HMF eliptical slip on. My elevation is about 2,075. I want to run with the airbox lid on, what main jet should I run? Needle clip position? Also, I would like to get a spark arrestor, how can I get one?

[motoz/HMF]

ALL HMF mufflers come with a spark arrestor, its the dome screen thing in the hardware kit.

This should work. But it is not going to run well with the lid on.
http://hmfengineering.com/forums/showthread.php?t=55