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Old 12-07-14, 10:13 PM
  #10  
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,508

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

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If the problem does indeed occur once per wheel revolution it simply cannot be caused by the chain, which should be obvious. The only thing that occurs with the chain/cog interface once per revolution is the same cog tooth (or teeth) engaging the chain. Therefore the first thing to check are the cog teeth. I see no other possibility than that or incorrect spacing.
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There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
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