Stock crankshaft + 70cc

Hello, I would like to ask, is stock crankshaft is enough for low end 70cc cylinders like:
Dr Evo RP, Malossi sport or Stage 6 Streetrace.
I would be using 19mm carb, and some low-end pipe.

It's pretty much always fine but can depend on the current mileage of the bike. The bearings pretty much always go before the crank does anyway.