Originally Posted by Dan Căta
What's the point in reducing the flywheel's weight? I knew that this only helps if you rew the engine while standing, and that while riding, the whole clutch+gearbox+shaft+rear wheel weight would not influence the flywheel, since it's so small compared to the other parts.
What I've noticed is it lets the motor rev quicker. Which can change the way the bike shifts, due to rev matching being a bit trickier sometimes. And sometimes the motor has more vibration, but mostly it allows the engine to pick up revs faster, which for a hp engine can be a good thing.