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The ARC Racing 6621-PH billet flywheel is designed specifically for the Harbor Freight Predator 212cc Hemi engine using a PVL digital ignition system. Precision-machined from billet aluminum and SFI certified, this flywheel replaces the factory cast flywheel with a stronger, race-ready component capable of handling sustained high-RPM operation.
Built for competitive kart racing and performance small engine builds, the 6621-PH features a finned design to maintain proper cooling while delivering consistent ignition timing at elevated engine speeds. The flywheel is non-adjustable and is preset at approximately 29° BTDC when installed with a standard flywheel key.
Important Fitment Notes: This flywheel is designed for Predator 212 Hemi engines running a PVL digital ignition system. It will NOT work with the OEM ignition coil and requires the 710106 PVL ignition. This flywheel is also not designed to be used with a pull starter.
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The 6621-PH billet flywheel is designed for the Harbor Freight Predator 212cc Hemi (Gen 2) engine.
No. The 6621-PH will NOT work with the OEM ignition. It is designed specifically for a PVL digital ignition system and requires the 710106 PVL ignition.
The flywheel is preset at approximately 29° BTDC when installed with a standard (stock) key.
Yes. The 6621-PH includes the ARC 5985 coil bracket with the required mounting hardware.
No. The 6621-PH is not designed to work with a pull starter.
ARC recommends a minimum coil air gap of .030" and tightening the flywheel to 65 ft/lbs.