dave,
are u sure its not just the clutch moving on the shaft.... because the clutch is designed to move about 1/4" to compensate for variation in clutch offset....
thats not good if the crank is moving that much, it would have to be broken if it moves that far, 1/4" is even alot for the crank to be broke, does it run???? You don't need help, you need a crank and cases. I have a complete motor if you need it
talking to the dealer yesterday he said it was the bearings when it got hot they swelled and losened up in the bearings ??????????? yes it runs and starts great