Daytona Monkey 12V SP Crankshaft 41.4mm for Horizontal Engines, Vibration Suppression, 63774

The SP crankshaft is balanced to match the typical piston weight of a 50mm-54mm piston diameter.

The balance ratio has been optimized to approximately 25%, the ideal for horizontal engines, reducing vibrations, while the connecting rod cross-sectional area has been increased to enhance rigidity.

High-speed type crank side bearings are used for superior sliding performance at high rotational speeds.

- Total weight of piston assembly (piston, piston rings, piston pin, pin clip) is approximately 90-115g for optimal balance. - Stroke: 41.4mm - Crankshaft assembly weight: Approximately 1725g (normal weight 1810g) - Woodruff key and crankcase gasket included - High-speed bearing 6304L1C3 included [Compatible models] Monkey/Gorilla (12V): Model Z50JN/P/S/T/V/W/X: Frame number Z50J-2000001～, Model Z50JY/1/2/4/5/6/7: Frame number AB27-1000001～ Monkey Baja: Model Z50JN/N/P: Frame number Z50J-1700001～ Monkey R: Model TZ50JRH: Frame number AB22-100017～ Monkey RT: Model Z50JRJ-2: Frame number AB22-1007601~

* Not compatible with FI models.

Compatible models: Monkey/Gorilla (12V), Monkey Baja, Monkey R, Monkey RT SP crankshaft balanced to match the weight of a typical piston with a piston diameter of 50mm-54mm Reduced vibration through balance adjustment (approximately 25%) for horizontal engines, and features a reinforced connecting rod and bearings that rotate smoothly even at high RPMs. Stroke: 41.4mm. Crankshaft ASSY weight: Approx. 1725g (Normal weight: 1810g) Includes Woodruff key, crankcase gasket, and high-speed bearing (6304L1C3). Can also be used as a replacement for the genuine crankshaft.