When overhauling the selector drum and selector Fork assembly, replacing as many of the wear and damage prone components as possible will produce a more reliable and durable result with a cleaner shifting, quieter running assembly.
Also check the foot change assembly for wear in the fulcrums and general damage?
Other parts that make up the assembly you may wish to consider:
Add as many new parts to the same shopping cart as you wish, new circlips 9900210600 for example, and still only pay the same single fixed price shipping cost.
Please be aware that this component may have other applications within the Yamaha model range, so check the part-numbers you order are correct for your model and application.
Pro workshop gasket sealant 08CRAHLG120G - easy to apply with professional results.