The Brian Crower 4340 billet crankshaft with a 66.2mm stroke is specified for 2016+ Yamaha YXZ and Textron XX applications. This crankshaft listing identifies the 4340 billet construction and the 66.2mm stroke dimension, making it the replacement crank for supported YXZ/XX engines where that stroke and material are required by the rebuild or upgrade.
Brian Crower Crankshaft - 2016+ Yamaha YXZ/Textron XX 66.2mm Stroke 4340 Billet