gg33x - Black Magic GSR Rear Sprocket
Black Magic rear sprocket for the GSR40 / GSR40-TS / GSR25 / GSR26R / GSR29R / ESR750 / ESR750EX / Go-Bike. Available in various sizes. Smaller size = more top speed. Larger size = faster acceleration. Made of ultra high-quality anodized 7071 aluminum alloy. May require use of a modified-length chain. Stock rear size for GSR40 / GSR40-TS / Go-Bike / ESR750 / ESR750EX is 76 tooth. Stock rear size for GSR25 / GSR26R / GSR29R is 84 tooth. Here are some performance change estimates when switching from a 76 tooth sprocket:
72 tooth = approx 6% top speed increase
68 tooth = approx 12% top speed increase
64 tooth = approx 18% top speed increase
60 tooth = approx 25% top speed increase
56 tooth = approx 33% top speed increase
80 tooth = approx 6% less top speed, but better acceleration
84 tooth = approx 12% less top speed, but much better acceleration
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