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Old 08-27-2009, 11:04 AM   #9
FastDoc   FastDoc is offline
 
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Join Date: Mar 2009
Location: Southeastern Washington desert
Posts: 14,761
I don't know what's causing the problem but I don't see how jumping or otherwise beating up the bike would do it.

1/2 inch slack would be way too tight on my HSUN, so maybe it's the same on a Zong. Try adjusting it with your son on the bike and the suspension compressed. You may also have a lubricant on the axle bolt that allows it to move.

Personally in 30 years or riding and wrenching that's a new one on me.
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