Bolt (4h7) Xs850 1981 (b) Usa

Rebuilding the head-stock assembly is always going to be easier and more straightforward when new, correct specification parts are specified.
If the adjustment nuts, seals and bearings are all replaced at the same time the results will be as close to perfection as it is possible to achieve.
Renewing the ancillary items will add to the overall aesthetic of the triple-tree area of the machine.
Other headstock related parts you may wish to consider:

9339999931
5VX2341500
9020122018
1RC2339300
1RC2343500
1RC2344100
1RC2344101
1RC2344A00
1RC2344A01
9131408030
1RC2484700
1RC2484701
1RC2484800
1RC2484801
9560210200
9018510115
1RC2338900
5SL2587600
9201706010
1RC2337700

Achieve perfection by renewing as many of the wear prone parts in the head-stock assembly as possible.

Add as many components to the same shopping cart as you wish, new nuts 9017925004 and washers 9020226142 26H2341801 for example, and still only pay the same single fixed price shipping cost.

This part may have other applications in the Yamaha model lineup. So, please ensure the part-number/s you order are correct for your model.