9437/18 18 tooth primary sprocket for trials

18 Tooth primary sprocket to replace the original 20 tooth sprocket. Brings gearing down for trials use. We also supply 15T 16T 17T and 20T. They fit 7E 8E 9E 10E 11E  31A  32A 33A 34A 35A 36A  37A 2L 3L  engines.


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