Chinese Crankshaft - GY6 50cc Engine Version 2 Chinese 50cc crankshaft fits several makes & models. Please use the pictures and measurements to best match your crank. Crank shaft details: - Over Length: 24cm [9.45"] - Bearing size/model: 20 X 47 X 14 [6204] - Bearing size/model: 17 X 42 X 12 [6203] - 16 tooth oil pump drive gear - Sprockets: 17 teeth each - Spline count on end of shaft: 26 spline - Thread size on tapered end: M10 x 1.25 - Thread size on straight end: M12 x 1.25 - Known to fit GY6-50 engines. Shipping details: Item(s) will be shipped within 1 business days once you finished your payment. Once we ship the item(s) out, tracking number will be offered for you. Professional Safety Packaging and Fast Delivery! Visit: https://www.chinesepartsmax.com/chinese-dirt-bike-parts/dirt-bike-engine-parts/dirt-bike-crank-shafts?product_id=11823