Is a new steering head lock washer necessary?

[fizzafulla]

Changing my cbr steering head bearings as they're stuffed, manual recommends a new lock washer, just wondering if this is really necessary and if so where to get one? cheers.

[Max Preload]

Changing my cbr steering head bearings as they're stuffed, manual recommends a new lock washer, just wondering if this is really necessary and if so where to get one? cheers.

Not neccessary.