What is the ARC 6621 billet flywheel?
The ARC Racing 6621 is an SFI-certified billet aluminum racing flywheel designed for Honda GX200 and 196cc Clone engines using a compatible PVL digital ignition system.
It is designed for high-RPM racing applications where a purpose-built billet flywheel is preferred over the stock cast flywheel.
What engines does the ARC 6621 fit?
The ARC 6621 is designed for compatible Honda GX200-style engines, including:
- Honda GX200
- 196cc Honda Clone
- Ducar 196
- Ducar 212
- Ducar 224
- Compatible Tillotson engines
- Wildcat 223
- Wildcat 240
- Predator Ghost 212
- Predator 224 Non-Hemi
Fitment can vary based on the engine's crankshaft, ignition system, and flywheel configuration.
Does the ARC 6621 fit a Honda GX200?
Yes. The ARC 6621 is designed for compatible Honda GX200 racing engines equipped with a PVL digital ignition system.
Does the ARC 6621 fit a 196cc Clone?
Yes. The ARC 6621 is designed for compatible 196cc Honda Clone racing engines using PVL digital ignition.
Does the ARC 6621 fit a Predator 212?
It depends on which Predator 212 you have.
The standard ARC 6621 is not a universal Predator 212 flywheel.
For Predator applications, verify the exact engine and flywheel configuration before ordering.
Predator 212 Hemi: Use ARC 6621-PH where applicable.
Predator 212 Non-Hemi: Use ARC 6621-P where applicable.
Does the ARC 6621 fit the Predator Ghost 212?
Yes, the ARC 6621 is designed for compatible Predator Ghost 212 applications using the required PVL digital ignition system.
Always verify the specific engine and crankshaft configuration.
Does the ARC 6621 fit the Predator 224?
Yes, the ARC 6621 is designed for compatible Predator 224 Non-Hemi applications using PVL digital ignition.
Does the ARC 6621 fit a Predator 212 Hemi?
No. The standard ARC 6621 is not the correct flywheel for the Predator 212 Hemi.
Use the appropriate ARC 6621-PH flywheel for compatible Predator 212 Hemi applications.
Does the ARC 6621 fit a Predator 212 Non-Hemi?
The standard ARC 6621 is not the correct universal replacement for all Predator 212 Non-Hemi applications.
Use the appropriate ARC 6621-P configuration where applicable.
Always verify the exact engine and ignition system before ordering.
Does the ARC 6621 fit Wildcat engines?
Yes, it is commonly used on compatible Wildcat 223 and Wildcat 240 racing engines when equipped with the appropriate PVL ignition system and matching crankshaft configuration.
Does the ARC 6621 fit Tillotson engines?
It can fit compatible Tillotson racing engines, including applications based on the GX200/Clone platform.
Verify the specific Tillotson model, crankshaft, and ignition configuration before ordering.
Does the ARC 6621 fit Ducar engines?
Yes, it is used on compatible Ducar 196, 212, and 224 applications when the engine uses the appropriate crankshaft and PVL digital ignition configuration.
What ignition system does the ARC 6621 use?
The ARC 6621 is designed specifically for a PVL digital ignition system.
It is compatible with appropriate PVL racing ignition coils such as the PVL-12K high-RPM coil.
Will the ARC 6621 work with the stock Honda GX200 ignition coil?
No.The ARC 6621 is designed for a PVL digital ignition system and is not compatible with the standard OEM Honda GX200 ignition coil.
Will the ARC 6621 work with a stock Predator ignition coil?
No.The ARC 6621 requires a compatible PVL digital ignition system rather than the standard Predator ignition coil.
Can the ARC 6621 be used with a charging stator?
No. The ARC 6621 is not designed for charging stator systems.
What ignition coil should I use with the ARC 6621?
Use a compatible PVL digital racing ignition coil. The PVL-12K high-RPM coil is one example of a compatible racing coil.
Verify coil and ignition-system compatibility before installation.
Is the ARC 6621 SFI certified?
Yes. The ARC 6621 is an SFI-certified billet aluminum racing flywheel designed for competition applications.
What is the ARC 6621 made from?
The flywheel is precision-machined from high-strength billet aluminum.
How much does the ARC 6621 weigh?
The ARC 6621 weighs approximately 3.2 pounds.
What timing is the ARC 6621 set at?
The ARC 6621 is a non-adjustable flywheel designed for approximately 29° BTDC when installed using the appropriate standard timing key.
Actual installed ignition timing should be verified with a timing light.
Is the ARC 6621 adjustable?
No. The ARC 6621 is a non-adjustable racing flywheel.
Its timing is preset rather than allowing the builder to rotate the flywheel to change ignition timing.
What is the timing of the ARC 6621?
The nominal timing is approximately 29° BTDC when installed with the appropriate standard timing key.
Always verify actual timing on the assembled engine.
Does the ARC 6621 come with a timing key?
The flywheel is designed to use the appropriate standard timing key. Check the specific product packaging or listing to confirm exactly which hardware is included.
What coil gap should I use with the ARC 6621?
The recommended minimum ignition coil gap is: 0.030" Always verify the correct gap for your specific PVL ignition coil and follow the ignition manufacturer's installation instructions.
What is the recommended flywheel torque?
The recommended flywheel torque is: 65 ft-lbs
Always verify the latest manufacturer's specifications and use the correct installation procedure for your specific engine.
Does the ARC 6621 include a PVL coil bracket?
Yes. The ARC 6621 includes the ARC 5985 PVL coil bracket and mounting hardware.
Is the PVL ignition coil included?
No, The flywheel includes the 5985 PVL coil bracket and mounting hardware, but the PVL ignition coil is sold separately.
What is the purpose of the flywheel fins?
The finned flywheel design helps move air through the engine's blower housing and cooling system.
The flywheel fan is an important part of the forced-air cooling system on Honda GX200-style engines.
Does the ARC 6621 increase horsepower?
The flywheel itself is not primarily a horsepower-producing component. Its purpose is to provide a purpose-built racing flywheel with the required strength, ignition compatibility, timing, and safety certification for high-RPM applications.
Why use a billet flywheel instead of the stock flywheel?
A racing billet flywheel is designed specifically for competition applications and provides a purpose-built alternative to the original cast flywheel.
The ARC 6621 also provides compatibility with PVL digital ignition systems and a preset racing timing configuration.
Is the ARC 6621 suitable for kart racing?
Yes. The ARC 6621 is designed for kart racing and high-performance small-engine racing applications, including compatible Honda Clone, Predator Ghost, Wildcat, Tillotson, and Ducar engines.
Always verify that the flywheel and ignition system comply with the rules for your specific racing class.
Is the ARC 6621 legal for Box Stock Clone racing?
That depends on the specific racing organization and class.
The ARC 6621 is an SFI-certified racing flywheel, but individual racing classes may specify particular flywheel, ignition, weight, or timing requirements.
Always check the current technical rules for your class.
Can I use the ARC 6621 on a recreational mini bike?
It may be used on a compatible engine if the engine is equipped with the required PVL digital ignition system and matching crankshaft configuration.
However, the ARC 6621 is primarily designed as a racing flywheel rather than a stock replacement for recreational engines.
What should I verify before ordering the ARC 6621?
Verify all of the following:
- Engine model
- Crankshaft configuration
- Hemi or Non-Hemi configuration where applicable
- Ignition system
- PVL compatibility
- Charging system
- Required flywheel part number
- Racing class requirements
The ARC 6621 is not a universal GX200/Clone flywheel.
What are the most important fitment warnings?
The ARC 6621:
- Requires a compatible PVL digital ignition
- Does not work with OEM/stock ignition coils
- Does not work with charging stator systems
- Is non-adjustable
- Is approximately 29° BTDC
- Is not the correct flywheel for every Predator 212 configuration
Verify your engine and ignition system before purchasing.
What is included with the ARC 6621?
The ARC 6621 package includes:
- ARC 6621 Billet Flywheel
- ARC 5985 PVL Coil Bracket
- PVL Coil Bracket Mounting Hardware
The PVL ignition coil and other engine components are not included unless specifically stated in the product listing.
