I recently bought a 2006 WR450F. I'm the third owner, the second owner said he didn't do any mods. I went to clean the spark arrestor and found the entire tailpipe was removed, not just the inner baffle. Would this bike have needed to be rejetted because of this? If I replace the tailpipe will I need to rejet? Would it still be noise legal without any tailpipe? I'm going for my first trail ride in a week and don't want to get turned away because the bike's too loud. I'll have to search other posts to find out how to inspect for the grey wire and where the throttle stop is located to inspect. Anything else I should check? Thanks for any info.