Alright so I'm new here and new to working on bikes in general but here it goes... I just got a 2004 CRF 250X. It has a FMF Q silencer on it, stock header and has the JD Jetting Kit. They guy had the jetting all set for this. The bike has not had the airbox cut open yet. I was looking into doing this and was wondering if I had to rejet the bike if I cut the airbox according to the CCC modifications. I've never rejetted a bike before and was looking to avoid this if I could. Any Help?
Thanks