Yanmar KM2-A Disassembly and Cone Lapping

This video shows how to Dissemble a Yanmar KM2-A transmission and lap the shift cone. This transmission is from a Yanmar 2GM engine. The Yanmar 2GMF, Yanmar 2GM20 and Yanmar 2GM20F, and Yanmar 1GM series engines all use this transmission.
The Yanmar SD 40 and SD 50 also use a clutch cone.
How to service a Yanmar clutch cone.