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...After making the replacement, I see that there is a little bit (I don't know how to measure this) of runout of the crankshaft pulley when the engine is running. While the belts were removed, I checked the cam shaft and crank pulleys, finding no evidence of looseness or keyway wear...
Are you saying that the belt/s display runout (eg Out-of-Round condition) when spinning on the crankshaft pulley? If so, then perhaps the teeth on the new belt/s are defective... I've never heard of such a thing though.. Guess I have to ask, How Much is the Runout?
 

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The belts do not display the "out of round" condition you describe. They sit sollidly in the groove of the crankshaft pully. I am not sure how to characterize the amount of runout at the crankshaft pully other than to say that when looking at it from the side (rather than from the front) I can see that one edge of the pully, say the top edge, is not steady. The "wobble" is not very pronounced, but enough to catch my untrained eye. Viewing the crankshaft pully nut from the side, it displays the runout as well.

Viewed from the side, neither the tensioners nor the camshaft pulleys display the runout.
So then, the Movement is along the length of the bike (fore/aft)?... in which case, there's nothing you can do about that short of replacing the crankshaft pulley. But then, I doubt that is necessary, because so long as the belts move Together (fore/aft) then there would not be any excessive wear due to the belt/s sliding across the width of the teeth on the pulley.

Is there any obvious Impact Damage to the crankshaft pulley?... perhaps from an accident?
 
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