•     Stroke: 57.8mm
•     Overall Length: 285mm
•     Flywheel Thread Size: M12x1.25
•     Flywheel Thread Length: 14mm
•     Drive End Thread Size: M12x1.25
•     Drive End Thread Length: 14mm
•     Inner Diameter (piston pin hole): 15mm
•     Number of Splines: 19
•     Main bearings included

#1 on Diagram - Crankshaft Assembly for 150cc and 125cc 152QMI 157QMJ GY6 4-stroke engines. Main bearings are included