Ok so here it is i just traded my kawasaki Ninja 500R for a Suzuki Savage but it runs alittle rich it bogs out at higher RPMs it has a brand new stock muffler and air filter.. my question is could it be running rich becuz it had a performance muffler before i bought? i have heard of people running straight pipes...i love loud bikes so can i just get a pieace of tubing bent up and bolt it on or do i actually have to buy a muffler?