Slightly Misleading.
The reason you don't have a before example is because that Polaris 900 will act exactly the same before and after balance.
You didn't balance anything for the most part.
You added mass plain and simple.... 2 perfectly round machined pieces machined from billet stock if machined correctly are in close to perfect balance.
The 900 cranks do not have a balance problem, they have a mass problem.......... they are simply to lite.
Stop acting like you know everything about motors.
I have now watched 3 of your videos and you are mostly wrong in all of them, and misleading in all of them.
As I posted in the other thread, I can prove you wrong in oh so many ways.
You went to balance school that does not mean you know anything about 2 stroke motors and drive clutches for that matter, The more videos of yours I watch the less you know.
Dan