Ok so some of you may remember me from the story of me running into the pond on my 4 wheeler some may not. But I have changed the oil and all the other good stuff, and I ordered a k&n air filter. Well now it runs fine and I have driven it for a while but one problem is with the idle it feels real sluggish sometimes and feels like something is wrong. Someone told me I would have to mess with the carbs because the air/fuel ratio is off, but I don't know how to do that. I bought it used so I don't have an owner's manual or anything. Also I was thinking about putting a new muffler on I have been on highlifter.com looking for mufflers but can't figure out which one I want sound doesn't matter, but I don't want to go deaf from it. Some suggestions on mufflers and your exp. with them would be good. Also I saw something in dirtwheels it was a dual muffler for a v-force but could you buy one for a prairie maybe? Also some wheels, my brother has some vampires on his 650 rincon and I really don't like them at all I want a mud wheel that isn't too aggresive like one that I could also ride on a paved or gravel road sometimes and feel stable. Thanks for your replies in advance.