Yamaha - Clutch, dog - 6J8-45631-01-00Yamaha Dog Clutch Gear Engagement Component 6J8 45631 01 00 Overview The Yamaha Dog Clutch 6J8 45631 01 00 is one of those internal parts that makes a big difference in how clean your engine shifts into gear. When it starts to wear down, youll usually hear it before you see itgrinding, slipping, or hard engagement going into forward or reverse. Its responsible for locking gears together inside the lower unit, so it needs to stay sharp and properly