I was thinking of Koken too - but honestly, sockets are probably the hand tool where there's the least difference from cheap to expensive in most use-cases.
Before I get flamed I should clarify - it's not that there's no difference between Husky and Nepros socketry, it's that the difference in function is a lot smaller than, for example, Husky and NWS pliers.
The difference between Williams and Snap-on, for example, probably won't matter much to your fasteners. I would just use a "good" brand like Williams, Proto, Koken, Nepros, Felo - even Tekton.
On the other hand, since you're talking about motorcycle assembly, there may only be like four to six sizes you need for fasteners that will show, so it probably isn't a big deal to go with Snap-on.