1988-2006 Yamaha ATV YFS200 Blaster service manual PDF download file., Page 109Get this manual
ENGINE ASSEMBLY AND ADJUSTMENT ENG
NOTE: Holdthe rotor (CDI magneto) by the Rotor Holder to tighten the nuts (Primary drive gear and balancer gear 1Rotor Holder: PIN U-01235 PIN 90890-01235 Tighten both the nuts simultaneously (Primary drive gear and balancer gear)