First of all, what pipe is currently on your kart? If you have a small can, it can be quite loud. If it is a large can, it is about as quiet as a KT100 can get. The can exhaust has about the same sound as a chain saw but, a little louder. If your getting complaints about noise from your neighbors, you might want to refrain from using a 2-cycle. Maybe pull the 2-cycle and put on a Harbor Freight 4-cycle if your just puttering around. It would be much more user friendly & you would be less likely to burn up a clutch.