hey guys
i have a 03 ltz 400 with a slip on big gun eco ser. pipe, a k and n with a pre filter. and i still have the lid on cause i basicly am riding in all sand so im being cautious. do i need to rejet. ive had it this way 6 month and seems to be running fine im just curious.

 

A good way to tell...is to pull the spark plug. Check the condition and color. Go based on what you find...


biz