I have a Sugnio GP 170mm crankset that i picked up used. and Im pretty sure the drive side is bent. The pedaling feels all wonkey after installing them. Same pedals feel fine on another crankset/bike.

Is it possible to bend a fordged arm or could it be a bad casting?
If i eyeball the crank it seem like it might be bent just before the pedal hole threads.

I was surprised to see this because the arm itself if flawless. Maybe before i got it, it had one hell of pedal strike or something else where it tweeked the arm but its an odd spot for bend too. I guess thats the risk you run buying old parts.