RE: McCulloch 31cc w/ Rear Exaust and Carb, is it better?
Its got some good stuff in it. Tuning and porting was real good. I did find out that the exhaust system can rob you of a lot of power. If you have an exhaust with no back pressure you will drop a lot of power, thats why a tuned exhaust adds a lot of power to a 2 cycle. I would give it 3 stars of of 5.
Ken