MOJTBE 212CC Torque Converter 30 Series for 3/4" Shaft — 12T #35 or 10T #40/41/420 Sprocket, Asymmetric Pulley

MOJTBE's 212CC Torque Converter 30 Series is a direct-replacement go-kart clutch that bolts to 3/4" straight-shaft engines and delivers smoother acceleration with selectable 10T or 12T sprockets.

This torque converter kit is built to upgrade small-engine drivetrains on karts, minis, and off-road machines. It replaces Comet TAV2-style units and fits a wide range of horizontal-shaft engines — including Briggs, Kohler, Lifan, Tecumseh clones and many more — providing a compact, durable, and tuned power-delivery solution for 2–8 HP motors.

How does this torque converter improve acceleration and top speed?

The MOJTBE 30 Series uses an asymmetric pulley design to shift engine load and optimize power transfer, smoothing initial acceleration while allowing higher sustained speed than a direct drive or simple centrifugal clutch. Its iron and aluminum construction balances strength with lower rotating mass to respond quickly under load.

• Asymmetric pulley profile for broader power band and reduced stalling.
• Lightweight aluminum components to reduce rotational inertia.
• High-strength iron wear surfaces for reliable engagement under load.

Which engines and chains are compatible with this unit?

This converter mounts to any engine with a 3/4" straight crankshaft and horizontal shaft orientation. You can choose a 12-tooth sprocket for #35 chain or a 10-tooth sprocket for 40/41/420 chain, so it works with common kart and mini bike drivetrains.

• Fits engines from 2 to 8 HP including Briggs, Honda clones, Kohler, Lifan, Robin, Tecumseh.
• 3/4" straight crankshaft mounting; bolts to Comet-style bases.
• Choose 12T for #35 chain or 10T for 40/41/420 chain installations.

What hardware and maintenance should I expect after installation?

The kit installs using the same bolt pattern as common Comet TAV2 units, so most existing mounting bolts and spacers will be compatible. Routine checks of sprocket alignment, chain tension, and periodic inspection of the driven surfaces will keep performance consistent.

• Swap onto existing Comet-style mounts with standard hardware; verify bolt torque.
• Inspect sprocket teeth and chain tension every few rides to prevent premature wear.
• Light lubrication of the chain and keeping the unit free of heavy debris extends life.

What are the construction and reliability highlights?

MOJTBE combines aluminum and iron in the drivetrain components to achieve a balance of durability and light weight. The materials and fitment are selected for repeated engagement cycles typical of off-road and karting use, delivering a long service life when maintained properly.

• Aluminum housing and machined surfaces for low weight and precise fit.
• Hardened iron contact areas designed for wear resistance under load.
• Precision machining for reliable alignment and reduced vibration.

Who is this for: The MOJTBE 212CC 30 Series torque converter is intended for DIY racers, kart builders, and hobbyists who need a drop-in replacement for Comet TAV2-style clutches or want to extract better acceleration and usable top speed from 2–8 HP horizontal-shaft engines. It's a good choice if you run #35 or 40/41/420 chain drivetrains and want a durable, serviceable unit that installs with common mounting hardware.