First of all, good choice on the bike. The wife has that Foreman and she loves it. Second...Did you run the differential lines and fan line up...This will help with the waterproofing...And third...The wifes bike has the HMF QS1 Eco pipe and it is not nearly as loud as mine and she did get a gain in power. I believe that when you jet the bike, the pipe is the other part...kinda like a 2 part application to work the best..That and it is " woods " friendly. If you ride in an area that is strict on the type of pipe, this will be 100% acceptable.. Good luck.. Here are some pics..