Start by getting your hammer and tapping the slot back to parallel. You can use the nut as a gauge. Next buy 2 serrated washers, and use one under the nut at each end.
If you prefer you could buy a pair of track nuts with built-in washers, but they might end up costing more than what you paid for the whole bike.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
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Last edited by FBinNY; 07-06-11 at 09:28 PM.