| Author | Message | ||
     Hunger |
It might be a silly question but... Would changing just exhaust tip affect the sound or performance? | ||
| Etennuly |
Not noticeably really. It is just a curved pipe that pushes the exhaust back away from your foot. If it changes much with the same diameter pipe, it would be more a matter of where you hear it. I added one to the other side. It made for the same sound on the other side, so that made it a little louder. Performance adder, I doubt it. The right side pipe had to be smaller in diameter and longer to get the hot exhaust out past the belt and guards. I added it in an experiment to relieve some heat from the muffler pipe as I was having an issue with running hotter than I liked. It sounded so good to me while riding that I left it on. | ||
| Hunger |
I'm not hunting for performance, was rather worried that it might spoil the sound. Thanks for answer! | ||
| Phelan |
I have a 12R muffler on my Uly. Kickstand hits the tip but you can't tell when riding. The sound is a little more noticeable for me because it exits more to the side, but not a bad sound. I like it. | ||
| Griffmeister |
The outlet tip is actually an extension of the third pipe as it comes out of the rear baffle inside the muffler. If you cut a hole and put another tip on the right side, you are actually opening the rear chamber that connects the first and second pipe. In that scenario, the right tip will be flowing exhaust that has gone through only one of the three internal pipes. That would pretty much be the same as fixing the interactive valve in the wide open position. I bought a 12R muffler to replace mine which was rusting away. As an experiment, and to eliminate said kickstand interference, I cut the rear chamber off and made a Y-pipe to exit the exhaust more towards the rear but pointing away from the tire. Then I shortened the rear chamber close to two inches and fit it around the new pipe and welded it back on. The appearance is similar to the Buell race exhaust. The sound is still close to original. Unfortunately I can't vouch for performance as my exhaust actuator quit and I can't afford a new one. Have it propped open about halfway to avoid the extremes hoping the stock fuel map can accommodate it. | ||
| Hunger |
Just for the record, I'm not talking about stock pipe here but an aftermarket one. Wanna modify/replace the tip which is interfering with idler pulley. Or rather have someone do it, to be precise. | ||
| Griffmeister |
In that case, if it's interfering with the pulley, it would seem that a minor modification is all that's required. Depending on the construction, you could change the tip angle or relocate it slightly and you would not have made any change in the airflow to affect sound or performance. The stock pulley doesn't really move, do you have an aftermarket tensioner style? | ||
| Hunger |
I have a standard idler pulley. Yeah, you can change angle or even hammer it to get clearance but also I would like to add a removable db killer (strange ideas come up in winter). Now it's tricky to make because the edge is bent inside, see the pic (yes, it's a big one - 4"). So I figured out I could just replace the whole outlet.  | ||
| Etennuly |
I would think you could take a 4" elbow, angle cut it to fit over the muffler exit then reduce it to like 2 1/2" for a tip. That alone should make it a little quieter. And it should give you a common size to find a short baffle insert to fit. | ||
| Griffmeister |
Gee, I almost hate to suggest this, but you could cut off the tip and weld a 1/2" deep ring in it's place with some threaded holes drilled around it. Then you could experiment repeatedly with any number of "bolt-on" designs. |
