The punk street racer kids like light flywheels because they are

snappy but the people winning races are running heavy

ones.

   Ken

Sorry to disagree Ken, but on our best drag bikes we use lightened crankshafts 
and clutch baskets. Inertia is inertia, rotational inertia is the same. It will 
take you longer to accellerate the heavy flywheel no matter what else happens. 
There are EXCEPTIONS to normal pratice of lightening rotating parts. AMA class C 
flattrackers found out that stagger fire V-twins work better on dirt. The Harleys 
had found their nitch. If you have enough power to cause wheelspin at any speed, 
(like a modern rail dragster) you might need a heavier flywheel to damp the load 
and unload cycles caused by the tires. Bill Jepson

 
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