Boomer, thanks for the tip on after market exhaust for the RSV.  You appear adamant on not having to rejet, but did your bike require adjustment of the fuel/air mixture on the carbs?  You say LOUD.  Are they obnoxiously loud or just a good throaty roar?  Would appreciate a response.  retldousn@earthlink.net (a retired MCPO, CWO4 and LT, submarine type.)