Twin balancer shafts, one in front of the crankshaft and the other in the cylinder head, reduce vibration for a smoother ride. BALANCER SHAFT2021-03-102021-03-10https://spinnin-wheel.com/wp-content/uploads/2019/08/logo_spinnin3.jpgSpinnin-Wheel AShttps://spinnin-wheel.com/wp-content/uploads/2021/03/pho_bike_det_690-enduro-r-2018-balancershaft_sall_aepi_v1.jpg200px200px