Improved Capped Magneto Flywheel + Ring Gear for Yamaha YFM 600 Grizzly 1998-2001 | # 4WV-85550-00-00 5GT-85550-00-00Don't Repair. Replace like a pro! New Heavy Duty Flywheel Rotor + Ring Gear + Gasket for Yamaha ATV UTV Introducing our newest Heavy Duty Flywheel Rotor For Yamaha ATV UTV. Anyone who rides or repairs the Yamaha ATV UTV is probably familiar with the flywheel problems common to these models. Most of these vehicles will have at least one flywheel failure in their lifetime so far. Low quality epoxy was used on OEM flywheels to secure the magnets to the