I just responded to you clutching question. As for the reeds. They will make a big differance in throttle response, believe me. But as for making more power, I could not feel it. As for a muffler/can, forget it. I had a DG silencer on mine and it lost power. Lost 200 rpms. The stock pipes on the 600 are way to big from Polaris. They flow to much. By adding an aftermarket silencer that flows more than the stock muffler, you lose even mor power. It sounds great, but you go slower. I loved the aggressive chassis. Superior wind protection and the most stable high speed sled I have ever owned. But a heavy sucker in the woods. You'll know after you ride hard through the twisties and come out the other side sweating your nads off. Enjoy.