PEM Premium Quick Change Gear Set - Set 1A - 10 Spline - 4.11 Ratio 4.23 / 4.00 - 4.86 Ratio 5.00 / 4.72 57BK Throttle stop is adjustable

Throttle stop is adjustable

increases stability while not sacrificing ride quality

Three interchangeable injector nozzles to cover a wide variety of HP levels (250cc/min

2% Filtration Efficiency

Replacement Parts: Square O-Ring: #MOR97321

PEM Premium Quick Change Gear Set - Set 1A - 10 Spline - 4.11 Ratio 4.23 / 4.00 - 4.86 Ratio 5.00 / 4.72 57BK Throttle stop is adjustableProduct Description: Quick Change Gear Set Premium Set 1A 10 Spline 4. 11 Ratio 4. 23 4. 00 4. 86 Ratio 5. 00 4. 72 Steel Sold Individually PEM Racing (Performance Engineering and Manufacturing) offers a wide selection of quick change gear sets, ring and pinion gears, differential cases, and other rear end components.