The Brian Crower 4340 billet crankshaft with a 71mm stroke is specified for 2016+ Yamaha YXZ and Textron XX applications. This crankshaft listing denotes the 4340 billet material and the 71mm stroke dimension, provided for replacement or rebuild scenarios on supported YXZ/XX engines that call for that stroke and construction.
Brian Crower Crankshaft - 2016+ Yamaha YXZ/Textron XX 71mm Stroke 4340 Billet