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What size are the stock sprockets?

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I just got a ( new to me ) 2005 CR250R, and I was looking for the stock sprocket sizes for it. Everywhere I looked said 13/48. Mine had a Sunstar 49 rear sprocket. Previous owner said it was the original one. I just put a PD 50 tooth on it.

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I just got a ( new to me ) 2005 CR250R, and I was looking for the stock sprocket sizes for it. Everywhere I looked said 13/48. Mine had a Sunstar 49 rear sprocket. Previous owner said it was the original one.

The '05 came stock with a 49T Sunstar.

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seems like stock is 13/49 on most of these bikes. That's what it is for my 96.

It should say in your manual, at least if you have an OEM manual. Mine is listed under General Information in the Specifications. Drive Train: Final Reduction: 3.769:1 (49/13).

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