Yeah, the guy in the video was putting way too much weight on there. Maybe 100% balance factor works for whatever that goes in, but all my internet research says NO.
I thought the video was funny because that little kid was making engine noises. It does show how simple the task can be done and I imagine most moped folks just buy a crank and toss it into the case with whatever kit; never even considering the potential balance problems.
thanks for the 30-40% info. I was gonna ask at some point if I couldn’t find it elsewhere.