Improved Magneto Flywheel Rotor for Polaris ACE 570 | General 1000 | Ranger / RZR 900 1000 XP 2013-2024 | 4013969Don't Repair. Replace like a pro! New Heavy Duty Flywheel Rotor Polaris ATV UTV Introducing our newest Heavy Duty Flywheel Rotor For Polaris ATV UTVs. Anyone who rides or repairs Polaris ATV UTVs is probably familiar with the flywheel problems common to these models. Most of these machines 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 rotor body. Over time and