I had a whole list of things to say about counterbalance but these dam two strokes cranks are already off balanced technically not by much but by enough to keep momentum in the right direction I'm sure so if you add more weight to the crank then it'd only make sense it'd just make it more sluggish.
Therefore it'd make sense for people looking to win with similar saws would want to drill them out and modify them to make them lighter so if you bog it a little it wraps right back up right?
Yes my brain is on fire right now
trying to think of the physics of it all since I don't know much about 2stroke haha
As for the flywheel thing I know on cars lighter flywheels just help the engine wrap up faster (throttle response) shaving tenth of seconds off of quarter mile times (if that) or on a dirt bike racing I'm assuming a heavier one for more control of wheel spin so it doesn't wrap up so fast and you don't fly into a hay-bail
Just my two cents I may be completely wrong on chainsaws haha
Now I'm reverting to brainless mode...