GoPowerSports 30 Series Torque Converter Kit

GoPowerSports 30 Series Torque Converter Kit

Upgrade your drivetrain with stronger low-end torque, smoother acceleration, and up to 10% overdrive top-speed potential.

The GoPowerSports 30 Series Torque Converter Kit is a heavy-duty aftermarket drivetrain system designed for small-block engines from approximately 3 HP to 7 HP. Instead of relying on a standard centrifugal clutch alone, this asymmetrical torque converter varies the drive ratio as engine speed changes—providing improved low-speed pull for hills and heavier loads while transitioning into overdrive at higher RPM.

This complete kit is a strong choice for go-karts, mini bikes, utility vehicles, and custom powersports builds that use a compatible 3/4" horizontal crankshaft.

Why Use a 30 Series Torque Converter?

• Improved Low-End Torque: Helps the engine pull away from a stop and climb hills more effectively.
• Automatic Ratio Change: The system changes ratio as engine RPM and vehicle speed increase.
• Overdrive Potential: Provides approximately 10% overdrive at higher speeds when the engine, gearing, tires, and vehicle are properly matched.
• Heavy-Duty Design: Suitable for small-block go-kart, mini bike, and utility applications.
• Complete Bolt-On System: Includes the driver, driven pulley, backplate, belt, sprocket options, guard, and mounting hardware.

Recommended Add-Ons

Complete your torque converter installation with the parts most commonly needed for clearance, maintenance, and performance upgrades:

• Engine Clearance: Depending on your frame and engine layout, a 1" Engine Riser Kit may be required to provide clearance between the backplate, engine, tire, or frame.
• Replacement Belt: Keep a spare 725 Asymmetrical Drive Belt available for maintenance or demanding off-road use.
• High-RPM Upgrade: Built engines may benefit from the Juggernaut Super 30 Series Driver, which is designed for higher-RPM performance applications.
• Visible Drivetrain Protection: Replace the standard guard with a Clear 30 Series Torque Converter Cover.

Complete 30 Series Kit Includes

• 30 Series Driver Clutch: 3/4" bore replacement driver
• 30 Series Driven Pulley: 6" diameter with 5/8" bore replacement driven pulley
• Heavy-Duty Backplate: Cast aluminum backplate assembly with pre-installed bearings
• Dual Sprocket Options:
  • 12-tooth sprocket for standard #35 chain
  • 10-tooth sprocket for #40, #41, or #420 chain
  • View the dual sprocket listing
• 725 Asymmetrical Drive Belt
• Plastic 30 Series Torque Converter Cover
• Mounting hardware

Chain and Sprocket Fitment

Choose the sprocket that matches your chain size. Use the 12-tooth sprocket with #35 chain or the 10-tooth sprocket with #40, #41, or #420 chain. Do not mix chain sizes or use a sprocket that does not match your chain pitch.

Installation Requirements

Technical Specifications

• Engine compatibility: Approximately 3 HP to 7 HP small-block engines
• Required crankshaft: Standard 3/4" (.750") horizontal keyed crankshaft
• Driver bore: 3/4"
• Driven pulley diameter: 6"
• Driven pulley bore: 5/8"
• Backplate dimensions: Approximately 13.5" wide x 7" high
• Backplate hardware: 5/16" fine-thread bolts
• Replacement bearings: Standard 6003 jackshaft bearings

Important Safety Information

• Never operate the torque converter without the drive belt correctly installed.
• Keep hands, clothing, hair, and loose objects away from rotating components.
• Do not run the system on a stand or in a work area without the belt and protective cover properly installed.
• Inspect the belt, pulleys, bearings, sprockets, and mounting hardware regularly for wear or damage.
• Use appropriate protective equipment and operate only in areas where your vehicle is legally permitted.

Technical Documentation: Download the 30 Series Technical Specification Sheet.

Give your compatible mini bike, go-kart, or utility vehicle stronger takeoff performance and smoother automatic gearing with the GoPowerSports 30 Series Torque Converter Kit.