Upgrade your GY6 50cc scooter engine with the Taida 44mm Stroker Crankshaft, designed specifically for 139QMB 4-stroke engines. Part of Taida’s 2600 series, this high-performance crankshaft is made in Taiwan with premium materials and precision bearings for outstanding durability and engine performance.
Perfect for mini stroker builds, this crankshaft increases stroke for more torque and power, making it an ideal upgrade for riders looking to boost performance and reliability. Comes equipped with a 22-tooth oil pump gear for improved lubrication at higher RPMs.
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Fits: GY6 50cc 139QMB 4-Stroke Engines (China-made brands)
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Stroke: 44mm
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Oil Pump Gear: 22 Teeth
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Overall Length: 247mm
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Thread Size (Tapered Side): M10 x 1.25
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Thread Size (Spline Side): M12 x 1.25
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Bearing OD (Tapered): 42mm
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Bearing OD (Spline): 47mm
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Number of Splines: 26
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Connecting Rod Inner Diameter: 13mm
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Made in Taiwan – Excellent Quality Bearings
