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I need a quieter exhaust on my Go-cart.? - mini dune buggy plans

I have a house built (not by me) with a Mini-Buggy 540cc 2-stroke snomobile it. It works very well, but she is very strong. I know some things, but not much about the engines. Does it hurt when I put some mufflers golf cart from the exhaust of the population of exhaust snowmobile. IE is the engine overheated, Moore, or significant weight loss (I hope the loss of power, but not) very large. Tricks that would not buy a aftermarket exhaust-$ 250 will be much appreciated, is required.