Chains and sprockets for Gen 1

[kab]

well I've purchased best front and rear aftermarket sprockets and a Tsubaki chain, I'm waiting for the Tab washers to come from the Yamaha main dealer, but after the comment on stripped threads on the drive shaft I have tried the old locking nut on the thread and although the threads look ok I'm wondering if a new nut should be fitted regardless. Question is ; is it normal practice to replace both sprockets, chain, tab washer and nut on each occasion?
Cheers