So I have a 2006 Honda rebel and I want to cut the exhaust in half to give it a nice look And make it sound better do I have to adjust the carburetor or rejett the carb if I do what’s the best way to do that.
Very good point. Some have restored back pressure by welding a washer with an appropriate sized hole back over the exhaust.Exhaust systems are engineered and the mufflers are designed relative to the engine displacement to create an engineered amount of back pressure. With the required amount of back pressure there will be a scavenging effect that will cause a lean condition ie unburned fuel is sucked out before it can be completely burned. There is no fix for that except back pressure. The engine will run hot and very erratic, although it will sound good and powerful.