Post Master General
Join Date: Apr 2012
Location: Bowling Green, VA
I Ride: '09 ZX6R
A change in volume, without a huge outlay in cost may be as simple as replacing the mid pipe. The OEM resonant box is quite heavy, and locates quite a lot of heat near the rear shock absorber.
Ixil makes a bolt on straight through pipe that can replace that entire assembly, and mates up correctly with the OEM muffler. These sorts of pipes can be had for less than $100, to multiple hundreds depending on who you buy them from and which mfg is selling it. Ixil is the least expensive option as far as I am aware.
"Basic stuff fellas. Use your head for something other than to break your next fall."