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Chain not catching and noise

I took my daughters bike to the dirt jumps and after jumping the chain will not catch sometimes.also if i pedal and then stop pedaling to coast it will make a rumble noise in the rear and tripped the pedals forward in a jerking motion. what did i do and how can i fix it ?

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Sounds like sand got into the chain, try spraying wd-40 well onto the chain then wiping the exccess

Posted on Jun 21, 2009

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