BLACKHORSE-RACING 30-Series Go-Kart CVT Torque Converter Kit — 6" Driven Clutch, 5/8" Bore, 3/4" Driver

BLACKHORSE-RACING 30 Series Bore GO Kart CVT Torque Converter Kit is a direct-fit replacement clutch set for small engines and recreational vehicles, offering a 6" driven clutch (5/8" shaft bore) plus a 30-series driver clutch (3/4" bore) engineered for smooth power transfer up to 8 HP.

This kit replaces common Comet and Manco part numbers and is built to restore or upgrade the centrifugal drive on mini bikes, go-karts, lawn equipment, and other small-engine platforms. The package combines a 6-inch asymmetrical driven clutch with a matching driver clutch designed for 30-series setups — it includes keyed bores and standard dimensions so you can swap it into many existing CVT housings without modification.

How does this torque converter kit improve go-kart and mini bike performance?

Reinstalling worn clutches with this kit helps the engine reach optimal rpm range faster and supplies consistent belt tension for better acceleration and responsiveness. The asymmetrical driven design helps the belt track correctly and reduces slippage under load.

• 6" driven clutch diameter for stable belt contact and torque handling
• 5/8" driven shaft bore commonly fits small-engine crank outputs
• 3/4" driver clutch bore with 3/16" keyway for secure crank attachment
• Works with engines up to 8 HP (driver clutch ideal up to 7 HP typical use)

Which machines and part numbers does this replace or fit?

The kit is designed to replace several frequently used OEM parts, making it a convenient retrofit for many older or damaged torque converters. It fits mini bikes, go-karts, lawn-machines and other small-engine gearboxes that accept 30-series components.

• Replaces Comet part numbers 219457A (driven) and 219552 (driver)
• Compatible with Manco 5957 and Yerf Dog Q43201W replacements
• Common fitment: mini bikes, go-karts, garden tractors, and utility vehicles
• Keyed 3/16" slot and 3/4" ID on driver clutch for many crank shafts

What are the key specifications and build details I should know?

The package includes a 6-inch driven clutch with a 5/8-inch bore and an asymmetrical face to maintain proper belt alignment. The driver clutch has a 3/4-inch internal diameter, 3/16-inch keyway, and is sized for typical small-engine torque and RPM ranges.

• Driven clutch diameter: 6 inches — ensures broad belt contact
• Driven bore: 5/8" (0.625") for common shaft fitment
• Driver clutch: 30-series, 3/4" ID with 3/16" keyway
• Rated application: up to 8 HP (driven); driver clutch suited for ~7 HP machines

How difficult is installation and what tools are required?

Installation is straightforward for users familiar with small-engine drivetrains; you’ll remove the old clutches, verify bore and key alignment, and press or bolt the new components into place. Standard hand tools plus a puller/press for stubborn parts are commonly sufficient.

• Basic mechanic tools: wrench set, socket set, and screwdriver
• Clutch puller and a soft-faced mallet or arbor press recommended for removal/installation
• Ensure the belt is the correct size and tension after assembly
• Inspect keys, set screws, and shaft for wear before reinstalling

Who is this for: This BLACKHORSE-RACING torque converter kit suits hobbyists, small-vehicle mechanics, and DIY owners restoring or maintaining mini bikes, go-karts, and light-duty lawn or utility machines. Choose this kit when you need direct replacement for Comet/Manco series parts, durable asymmetrical driven geometry for better belt tracking, and standard bore/key configurations for almost-ready installation.