I removed the gov, put in med strength valve springs, mikuni22mm with fuel pump, and pulse manifold and the flywheel exploded and turned my engine into a paperweight, I was lucky not to get hurt and lucky all my hp parts are fine because they cost more than the clone engine!
get a billet flywheel if not for performance for saftey because you should see how bad it dented the mounting plate.
http://www.oldminibikes.com/forum/honda-clone-engines/15603-phase-2-arco-bomber.html
scroll down to see pics after the flywheel decided to shatter
buy a better flywheel before you buy anything else your a billet flywheel should outlast the engine it is on and defiantly make the engine its on last longer at least it will if its a clone