Chainsaw Repair

I have a big single chamber tuned pipe on a Husqvarna 372. It made a considerable difference in power. But I don't consider it practical for use in the woods.

The chainsaw is typically used WOT wide open throttle so the single chamber pipe like is used on a RC racing boat engine works best for the chainsaw.

The pipes used in RC pattern work have two expansion chambers. They are tailored for stability of the engine run as well as make more power. Then there are the tuned cans used by the 3D guys.

Most of the early chainsaws had reed valves and many of these were converted for use on RC model airplanes.