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I have seen the roller tip axle fulcrum back out of the bore, with semi catastophic results. Personally I think Aluminum Rocker arms should be checked real often for various reasons. There are different expansion rates for the 6061 T-6 aluminum and the hardened steel cup insert, and with all the pounding and heat stress it is inevitable that somthing is going to move.
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Rick
As you slide down the Banister of Life, may the splinters never be pointing the wrong way 
Last edited by Rick Parker; 06-18-2009 at 10:32 AM..
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