Crankshaft Type-2 GY6 49cc QMB139 > Part # 151GRS238
Grand Rapids Scooter's Crankshaft Assembly, Type-2 for 50cc 4-stroke QMB139 engines. Has 22 tooth oil pump drive gear.
Supported Models: Bintelli, Tao Tao, Peace Sports, Wolf, Schwinn, Puma, SYM, Alliance, Motorino, and Kymco.
Specifications:
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Stroke: 41.4mm
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Overall Length: 247mm
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Thread Size (tapered side): M10x1.25
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Thread Size (spline side): M12x1.25
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Bearing Outer Diameter (tapered side): 42mm
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Bearing Outer Diameter (spline side): 47mm
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Number of Splines: 26
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Number of Teeth (oil pump drive gear): 22
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