mjskier Posted August 23, 2006 Anybody else with a FMF powercore II shorty find that silencer very noisy? I have a 99 YZ250 with a Fatty pipe and that silencer. This is the second time that somebody comments at the track that my bike is very noisy. It has a very distinct snappy sound (one guy described it as "crisp") Both times it was suggested to me to look into repacking the silencer. The thing is I had just done that before I got that comment. I suppose I could have messed up the repacking, but frankly it seems that it is so simple that it would hard to do it wrong... Thanks, Bruno. Share this post Link to post Share on other sites
aedwards07 Posted August 23, 2006 What muffler packing did you use?Also if you pack your muffler too tight it will actually be louder. Share this post Link to post Share on other sites
mjskier Posted August 23, 2006 What muffler packing did you use? The first time (4 months ago) I used white FMF packing material. This time I used a black material I got at the Honda store. It didn't seem to make any difference. I don't think I got it too tight as it wasn't very hard to put things back together. It is possible though. I cut things to length but with the Honda material I put all of it in. The FMF packing was a bit longer and I had to cut some of it off so that the wrap wouldn't be too thick. That's why I thought maybe I didn't put enough in and since I was going to a 4 day MX class on private property I was going to be a good citizen and repack... Bruno. Share this post Link to post Share on other sites
kx_rider53 Posted August 23, 2006 I have a shorty, it is noisy but not that much noiser than others. I do change the packing every 10 hours. Share this post Link to post Share on other sites
redrider91 Posted August 24, 2006 The shorter the pipe the fast and louder the air gets out and i herd that makes them louder!!!! Share this post Link to post Share on other sites
kyleyz Posted August 24, 2006 ive got a shorty...but i still cant hear my bike when im around a 4stroke so i dont care...notice how FMX bikes are really loud? Share this post Link to post Share on other sites
Motocross26 Posted August 25, 2006 The shorter the pipe the fast and louder the air gets out and i herd that makes them louder!!!! It's because there's less material in the pipe to dampen the noise. Share this post Link to post Share on other sites
Motocross26 Posted August 25, 2006 The shorter the pipe the fast and louder the air gets out and i herd that makes them louder!!!! Shorty pipes are loud because there's less material in the pipe to dampen the noise. Share this post Link to post Share on other sites
