Ive spent the last week searching through the archives on the WR426 and may pick one up tomorrow(2002). I few questions are still unanswered: 1)Removing the stock exhaust 'cork' improves flow/performance but will this make the stock exhaust louder? 2) Living in CA Im wondering what the noise level is for the stock exhaust either mod'd or unmodified. 3)I read someone who used the "Vortip" baffle. What changes will occur when using this baffle (ie. noise, performance,etc.) 4)What gearing came stock on the WR426? 5) Was the 'BK mod' necessary on the 2002 model?