Driven Racing 420 Rear Sprocket for Kawasaki Z125 Options:30T Vented Heat-Dissipation Windows: Strategically machined

Vented Heat-Dissipation Windows: Strategically machined perimeter cutouts dramatically increase airflow

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Jet 50 Eton Beamer

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Driven Racing 420 Rear Sprocket for Kawasaki Z125 Options:30T Vented Heat-Dissipation Windows: Strategically machinedDriven Racing EVO TECH rear sprocket for Kawasaki Z125 with 420 chain. Driven Kawasaki Z125 rear sprockets are available in 30t and 32t options. A few rules regarding gear ratios for sprockets are as follows: Drop teeth on front add teeth to rear = increased torque, increased acceleration, wheelies, racetracks with short straights Add tooth on front reduce teeth on rear = increased top end speed, open road cruising, lowers RPMs, better gas mileage,