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Upgrade your engine with the ARC Racing 6623-E billet flywheel, engineered for Honda GX340, GX390, Predator 420, and other big-block small engine platforms. Designed for both electric start and pull start engines, this SFI-certified billet flywheel delivers the strength, durability, and ignition reliability required for high-performance racing and demanding engine builds.
Precision-machined from billet aluminum, the 6623-E replaces the stock cast flywheel with a stronger and more reliable component. The flywheel timing is fixed in the stock position at approximately 24° BTDC using a stock key and works with the OEM ignition coil without requiring a coil bracket.
Important Fitment Notes: This flywheel will NOT work with charging stator systems. It is also not intended for use with newer UT2 ignition coils that include a built-in 4500 RPM rev limiter. Earlier style coils without the limiter are required for proper operation.
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The 6623-E flywheel fits Honda GX340, GX390, Predator 420cc, and Vegas 460cc engines. It is designed for large-block kart racing and performance engine builds using these platforms.
Yes. The 6623-E is designed to work with both electric start and recoil pull start setups, making it a versatile option for different engine configurations.
The flywheel keyway is fixed in the stock position at approximately 24° BTDC when used with a stock key.
Yes. The 6623-E uses the stock ignition coil and does not require a coil bracket. However, it is not intended for use with newer UT2 coils that have the built-in 4500 RPM rev limiter.
ARC recommends tightening the flywheel nut to a minimum of 85 ft/lbs during installation.
No. The 6623-E billet flywheel is not compatible with charging stator systems.
