Hey guys. Iâ€™m chasing a little bit of experience, knowhow and opinion. Please tolerate my ramblings, Iâ€™ll try to keep it short. Basically, everything started when I decided my exhaust was slightly too loud. I have an â€œinsert-ableâ€ baffle*, but it makes the bike sound like a spitfire. Iâ€™ve never repacked the exhaust, and itâ€™s done about 20,000 kms. So as far as I figure, a repack could cut down the noise. *I use the term â€œinsert-ableâ€ because â€œremovableâ€ seems to imply that the baffle is usually in there Q1. Should I go get some proper exhaust repacking material, or are there better alternatives to cut noise? Can I jam as much packing material as possible around the centre pipe, or is there meant to be an air gap against the canister? Iâ€™m running a CF tri-oval Yoshi slip-on. In my research, I have come across a trend of chopping off some of the canister to make a DIY shorty can. They look especially cool, and I am very keen on trying this for myself. Problem is that logically, less muffling junk crammed into the now smaller can = more noise. Plus my hesitation to start hacking away at a relatively expensive can. Examples of DIY shorties can be found at: http://www.gixxer.com/forums/showthread.php?t=134113&page=12 Q2. Anyone with experience/opinions on the DIY shorty? Wanna save me from a exxy mistake? The general consensus from my research is that shorties are louder than before, and yeild varying performance results (ranging from losing 10+ hp and low down grunt through to gaining hp). So Iâ€™m getting slightly excited now. This arvo I dropped into supercrap today and picked up rivets and bits to do this job. Putting away my shiny new riveter, I got skightly sidetracked and pulled off my exhaust just to have a look, as you do. The weird thing I noticed is that there is a 2-3mm hole in the inlet endcap, at the very bottom of the muffler. Itâ€™s fairly round, which makes me think it was purposefully drilled rather than a rust hole. Otherwise, if water got trapped in the muffler, this is where the rust spot would be. Q3. Is it common to drill a drainage hole in the a$$ of a muffler? Itâ€™s blowing a fair amount of air, and I suspect itâ€™s the culprit for overlaying my beautifully bassy thumping exhaust note with a farting noise.