Just got done putting on a Yoshimura silencer on my p650. I hand built everything myself. The silencer is a quiet type for a VR1000. It runs about 95db. I am going to have it checked at the local DNR to see for sure. Its about the same as my exhaust mod but with alot more power hehe. I have a 300ft strip in my parents farm that it will usually get about 44-45mph. Now i am hitting 50-51. It also pulls like crazy upto about 57-58mph. Huge difference. And it looks awsome hehe. I am going to try and get some pics of it today. I'll postem later. I picked th silencer up at used parts place. It was new. Only paid $60.