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Old 02-08-2009, 07:36 PM
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As boogie states they need to be tight. After you install them in the crank, make sure you measure the height of the key in relation to key way depth of the balancer. I found the key way on my scat crank was not machined to the proper depth so it was necessary to mill a bit off the top of the keys. This can be accomplished with the keys in place.
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