I've put YOSHIMURAExhaust System in Goose 350, but I installed a Baffle so it sounds fine. This Baffle is 0. Size variation was in 5 millimeters, it was SizeExactly. But there are subtle gaps, and the sounds are lit, so fill it with Muffler pate. I think that it is a problem of Baffle shape that there are no gaps but a sound is produced.
Still it did not bother me. Idling, running noise has also decreased considerably. I feel that Torque at low rotation also increased. Touring is now easier.
I was attaching Silent bomb 3 to FMFQ 4, I thought that it was just the right level for me, but it was told that Motorcycle store says that this exhaust system can not be serviced. Purchase trying to keep volume down even a bit. It is pretty quiet but I am researching because I want to lower it a little more.