The middle gear assembly takes the brunt of the torque from gearbox to the drive shaft and, ideally, should be inspected and overhauled at the same time as the drive-shaft itself.
This component, and perhaps some of those listed below may be required?
The drive-shaft and middle gear assembly should be inspected and overhauled in unison .
Add as many items as you wish to the same shopping cart, new fasteners and seals for example, and still only pay the same single fixed price shipping cost.
This component may have other applications within the Yamaha model range.