Wiseco piston weight difference.

[Bare]

You don't imo. Lotsa faith based assumptions I suspect.
In My mind the best thing about Wisecos is their V nice thin piston rings and their liteweight wrist pins.
If you don't mind the rattle noises before a careful warm up ritual and you've adhered to the Exact clearance requirements..
they are best of aftermarket choices.
Noting that OEM Yama pistons are Always the premier choice.. IF possible.

[RZtuner]

Normally pistons are balanced by removing material from inside the crown or around the inner piston bosses, not by trimming the skirt. On two strokes, I prefer to take material off the piston boss. You need to take a good look at your piston design to see where it's best to remove material. Some pistons have a balance pad around the piston boss specifically for balancing. If this is the case it is easy to set them up on a mill and skim a little material off.

[Yellow and Black RZ]

As Bare says; Because of the different piston and cylinder rates of expansion, Wiseco forged pistons require larger bore clearance than pro-x/art/yamaha cast pistons.
Wiseco get a bad name when they seize up because the stock spec bore clearance was used.