A system for dressing centrifugal clutches has a drum tool with an internal abrasive surface, and a flap tool with abrasive flaps. The drum tool can replace the clutch drum on the clutch driven shaft to dress the clutch shoes, or the flap tool can replace the clutch shoes and mechanism on the clutch drive shaft, which may be the engine crankshaft, to dress the clutch drum. In either case, the tool being used and the component being dressed can accurately simulate the engagement of the clutch shoes and clutch drum in operation, so that the clutch drum and shoes can be accurately dressed to the correct shape, matching each other, for use.