QUOTE(Krom @ Apr 21 2008, 08:28 PM)

The new engines (4 stroke esp.) are much more sensitive to proper balance, and the new clutches are balanced much better than before. The clutches are only sold as an assy to be sure they stay balanced.
Sounds like another excellent opportunity for the aftermarket to supply clutch parts!
There are others beside the factory that can balance clutches carefully as well.