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669 Drive Belt for 30 Series Torque Converters – Comet & Clone CVT Replacement
669 Replacement CVT Torque Converter Belt
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669 Drive Belt for 30 Series Torque Converters – Comet & Clone CVT Replacement

Part Number: 669
Online Price: $19.99
Phone Order Price:$21.99
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669 Drive Belt for 30 Series Torque Converters – Comet & Clone CVT Replacement
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Description

669 Drive Belt for 30 Series Torque Converters | Comet, TAV2, Clone CVT Compatible


The 669 CVT Drive Belt is a high-performance asymmetric torque converter belt designed for use in 30 Series Torque Converters, including popular systems like Comet TAV2Juggernaut, and clone CVTs. Built with durable, heat-resistant materials, the 669 belt ensures smooth, consistent power transfer in go-kartsmini bikes, and small utility vehicles.


With a 27-inch outer circumference and 3/4-inch top width, this belt is ideal for OEM replacements or performance upgrades on vehicles like the TrailMaster MB200Coleman BT200X, and others using bearing-style drivers.


Belt Specifications:

  • Size: 669
  • Top Width: 3/4" (0.75")
  • Outer Circumference: 27"
  • Type: Asymmetric (flat on one side, angled on the other)
  • Construction: High-durability rubber compound with reinforced internal cords
  • Markings: “669” stamped on belt


Compatibility:

  • Torque Converters: 30 Series (Comet, clone, Juggernaut, TAV2-style)
  • Mini Bikes:
    • TrailMaster MB200 (bearing-style driver)
    • Coleman BT200X
    • Baja Warrior, Motovox MBX10/11
  • Go-Karts:
    • Chinese 6.5HP karts with 3/4" shaft
    • TaoTao 110/125cc ATV with torque converter systems
  • TAV2 Kits: 218352AM and other common 3/4" shaft aftermarket kits


Why Choose the 669 Drive Belt?

  • Exact Fit for Popular CVTs – Designed to match OEM belt specs for consistent, reliable operation
  • Low Stretch, High Grip – Engineered for superior traction and minimal belt slippage
  • Durable Construction – Withstands heat, friction, and torque load in high-RPM applications
  • Smooth Acceleration – Maintains optimal engagement between driver and driven pulleys


Ideal Use Cases:

  • Stock or lightly modified mini bikes and go-karts
  • Riders looking for OEM-spec replacement with dependable performance
  • TrailMaster MB200 or similar frames running bearing-style torque converter drivers

Note: If you have a bushing-style driver or want more top-end speed, consider upgrading to the 725 belt(27.5" long).


30 Series CVT Belt Comparison: 669 vs. 725 vs. 788

Belt Model

Top Width

Outer Circumference

Belt Style

Common Applications

Performance Notes

669

3/4" (0.75")

27"

Asymmetric

TrailMaster MB200 (bearing-style driver), Coleman BT200X, Baja Warrior, Motovox MBX10/11

Standard size for stock minibikes and TAV2 kits. Quick engagement. Best for acceleration and low-end torque.

725

3/4" (0.75")

27.5"

Asymmetric

TrailMaster MB200-2, American Sportworks 5210, Hammerhead 80T, Predator 224 TAV kits

Slightly longer than 669; reduces belt wear and heat. Improved top speed. Ideal for upgraded or modified setups.

788

3/4" (0.75")

30"

Asymmetric

Custom or taller jackshaft setups, high-speed builds, extended mounting distances.

Longest belt; delays engagement for more top-end. May require pulley spacing changes or tension adjustments.


Belt Style Key:

  • Asymmetric Belt – Flat on one side, angled on the other. Must match with asymmetric torque converters like Comet 30 Series and clones.


Tips for Choosing the Right Belt:

  • Use 669 for stock setups or if you’re replacing the original factory belt.
  • Upgrade to 725 for slightly more top speed, especially if you’re using a bushing-style driver or running a Predator 224.
  • Choose 788 only for custom setups where pulley spacing or speed ratio needs call for a longer belt.

FAQ

669 CVT Drive Belt – Frequently Asked Questions (FAQ)


What is the 669 belt used for?

The 669 belt is a replacement drive belt for 30 Series torque converters, including Comet TAV2, Juggernaut, and Chinese CVT clones. It’s most commonly used on mini bikes like the TrailMaster MB200, Coleman BT200X, and Baja Warrior.


What are the exact dimensions of the 669 belt?

  • Top Width: 3/4 inch (0.75")
  • Outer Circumference: 27 inches
  • Style: Asymmetric (flat on one side, angled on the other)


What type of torque converter does the 669 belt fit?

The 669 fits 30 Series torque converters (Comet-style or clones). These use an asymmetric belt, which means one side is flat and the other is angled. It is not compatible with 40 Series or symmetric systems.


What’s the difference between the 669 and 725 belts?

The 725 belt is 0.5" longer than the 669, offering slightly more top-end speed and a smoother engagement curve, especially useful for the TrailMaster MB200-2 and engines with bushing-style drivers. The 669 is best for stock setupswith bearing-style drivers.


What vehicles is the 669 belt compatible with?

  • Mini Bikes:
    • TrailMaster MB200 (bearing driver)
    • Coleman BT200X
    • Baja Warrior
    • Motovox MBX10, MBX11
  • Go-Karts:
    • TaoTao ATVs
    • American Sportworks go-karts (specific models)
  • TAV2 Kits:
    • 3/4" shaft torque converter kits (Comet or clone)


Can the 669 replace Comet OEM belts?

Yes. The 669 is a direct replacement for:

  • Comet 203589A
  • Belts used in most TAV2 30 Series kits
  • OEM belts marked 669 for American Sportworks and Coleman mini bikes


Is the 669 belt durable and heat resistant?

Yes. It’s made from reinforced rubber compounds with high heat and wear resistance, designed for continuous high-load operation on small engines.


Do I need to measure my old belt before ordering?

It’s recommended. Belt length and fitment can vary slightly due to:

  • Engine mounting differences
  • Driver spacing
  • Clutch type (bushing vs. bearing)
    If unsure, consult your user manual or measure your current belt’s outer circumference.

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