Where is the restriction on 05 WRF Muffler
Posted February 28, 2005 - 12:34 PM
I want a quiet bike for trails. The 450 has plenty of power no matter which pipe I use, but I was thinking the FMF let the engine run better. However, that quiet insert is anything but quiet. Their muffler is light with only a square tube inside. I think it was psychological that I preferred the FMF because I could not hear all the chinsy engine sounds you hear with the stock. But with resistance just blowing into the stock muffler means that there is significant resistance on the low end too? I like to ride below 1/2 throttle and mostly end up >1/4 when fooling around so low end power is paramount for me.
I am worse than an old lady deciding where to put furniture on this one. Can't decide which muffler is better. Will the new stock replacement insert from Promotobillet be significantly better in spite of the muffler's internal resistance? Any other thoughts?
Posted February 28, 2005 - 12:56 PM
Throaty but not too loud. Probably around 97 db but deeper sounding than stock. If you want 94 db just stay with the FMF Q series. You can modify the power core opening to quiet her down but you lost the low end that you get from her throat being cleared.
Posted February 28, 2005 - 04:00 PM
What about that stock WR? That resistance is surprising. I just looked at the Promotobillet insert thread and from Lorenz's picture that he implied that the exhaust is flowing through the grading and not a lot from the two tubes?