i was sitting here wondering how a stock 450 silencer stacks up to some of the aftermarket jobs....do you really gain that much by switching them around? what about jetting for a new silencer? can the stock silencer be modified? ( noise isnt and never was a issue for me ) one more note, after a long run in 3rd, 4th gear, on deceleration, there are a few pops..... would that be right, or does the bike need some diff. jetting? im real new to the 4 stroke thing, any advise is always helpfull!!!