i have a micron 4 to 1 exhaust . the thing just sounded great, and the one day i started it up and it was quiet, too quiet...
i haven't lost any performance the the sound has just cut in half. i can not figure out what has happened to it.....

 

My bike sounded a bit raw when I brought it, Since have the exhaust repack, it sounds great
I would say that you could be due for a repack, or someone shoved something up there

 

i rode it on saturday and it had a nice low and loud sound to it.. on sunday and ever since it doesn't sound the same. i hope it is the packing

 

Got any little critters that might have crawled up in there. A funny story... One time I had an 1983 GS1150ES. and it had a 4:1 system Vance and Hines, as I recall. Anyways, I installed it on a saturday afternoon. Ran it one cycle, then checked the jets and corrected accordingly. Then, I went out to start it the next day and I had a similar issue only it felt like it was restricted and lacked sound. In fact it ran for like 10 seconds, felt weird, so I shut it off. Got a flashlight and looked down in their and saw something yellowish tan. As I was getting ready to disassemble it to check, my 6 year old daughter came out and asked me where the ferret was. Hahahahaaa. Her pet ferret escaped from its cage, got out into the garage, and crawled up in the pipe as it was warm. It was facing the end of the pipe. It suffered a little carbon monoxide and some fringed up tail hairs, but it was ok. Hehheheeee.

 

Good thing you didn’t give the throttle a good blast

 

Hey Mark, whats involved with a re-pack, is that something you do yourself or take it to the shop?

 

You can do it yourself, I brought some fibreglass packing and started to remove the pipe, then decide it would take me too long to do and I would need to buy some more tools, so I took it to the shop.

Basically, you disassemble the pipe, repack the core with new fibreglass packing and put everything back together, but I not talking from experience.

 

can i just remove the packing and run it that way? i can look up the tail pipe and see all the way to the bend in the pipe about 10 inches in front of the muffler, so it can't be that restrictive

 

Don’t think packing is about restricting the exhaust, it's about reverberations,
you could try it, but I reckon the bike will sound like a two stroke lawnmower trapped inside an oversize beer can.

 

lol i'll keep that in mind while i check the packing.