Lightened flywheel for 650?

Getting ready to order a new bendix drive for my x2 figured while I had the flywheel off if it's worth it to get a lighter flywheel? And if so what I'm looking for? It's already got a pipe, mikuni 44 carb, westcoast intake, reeds and a impeller so it's probably my next step before a 750. Also oem replacements for the gasket for the engine cover?
 
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