Just finished putting on 2 new sprockets. The rear one was worn down to nubs after 11,000+ miles with the 140 engine. Found a 45 tooth JT brand sprocket on Amazon for $15 with free shipping, and a 17 tooth front for $9 and free shipping on eBay. All ready for Arizona this winter.

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Q (Quantum Mechanic)

1968 CT90/140
2007 Lifan 200
2005 Zongshen 200
1981 Honda GL500 Interstate