QMB139 Crankshaft, Type-2

Crankshaft Assembly, Type-2 for 50cc 4-stroke QMB139 engines. Has 22 tooth oil pump drive gear.

• Stroke: 41.4mm 
• Overall Length: 254mm 
• Thread Size (tapered side): M10x1.25 
• Thread Size (spline side): M12x1.25 
• Bearing Outer Diameter (tapered side): 42mm 
• Bearing Outer Diameter (spline side): 47mm 
• Number of Splines: 26 
• Number of Teeth (oil pump drive gear): 22