BLACKHORSE-RACING 30 Series CVT Torque Converter Kit — 6" Driven + 3/4" Driver Clutches, 5/8" Shaft, 8HP

This kit pairs a 6-inch asymmetrical driven clutch with a matching driver clutch to restore CVT performance on compact recreational and utility machines. Specifically made to replace common Comet and Manco part numbers, the kit supports small horizontal-shaft engines and provides straightforward mechanical swap-in without complex modification.

What exactly comes in this torque converter kit and what are the key specs?

The kit includes a 6" diameter driven clutch and a compatible driver clutch sized for small engines. The driven clutch accepts a 5/8" shaft and is rated for up to 8 HP, while the driver clutch has a 3/4" bore and fits standard 3/16" keyways.

• Driven clutch: 6" diameter, 5/8" shaft bore, asymmetrical design, supports up to 8 HP
• Driver clutch: 3/4" bore, built to replace Comet 219552 / Manco 5957
• Driver keyed for 3/16" slot with standard ID hole for easy mount
• Cross-compatible with common part numbers: Comet 219457A, 219552; Manco 5957; Yerf Dog Q43201W

How does this kit improve driveability on a go-kart or mini bike?

By matching a properly sized driven clutch with a compatible driver, the kit restores correct belt tensioning and engagement characteristics. That means smoother takeoff, more predictable shifting under load, and better acceleration when the vehicle is loaded or climbing.

• Smoother belt engagement reduces stutter at low RPM
• Correct pulley diameters improve torque multiplication
• Asymmetrical driven face promotes consistent belt tracking
• Replacement parts restore OEM-style shifting behavior

Will this replace my existing Comet or Manco clutch without modifications?

Yes — this kit is engineered as a direct replacement for several Comet and Manco part numbers, so in most setups it installs with standard mounting hardware. Confirm shaft diameter and keyway size before ordering to ensure compatibility with your engine and pulley layout.

• Direct replace for Comet 219457A (driven) and Comet 219552 (driver)
• Alternative fit for Manco 5957 and Yerf Dog Q43201W
• Check: driven 5/8" shaft, driver 3/4" bore, 3/16" keyway
• May require only existing belts and fasteners — no machining

How durable and maintenance-friendly is the BLACKHORSE-RACING clutch pair?

These clutches are manufactured to handle the wear common to off-road and recreational use while remaining serviceable. Routine checks of belt condition and fastener torque are recommended; replacement life will depend on usage intensity and belt maintenance.

• Sturdy asymmetrical driven face for even wear distribution
• Precision-bored bores and keyed driver for secure fit
• Compatible with typical belts used on go-karts and mini bikes
• Simple disassembly for inspection or replacement of individual parts

Who is this for: This BLACKHORSE-RACING 30 Series Bore kit is aimed at DIY mechanics, go-kart and mini bike owners, rental fleet technicians, and lawn/garden equipment refurbishers who need a dependable, direct-replacement torque converter set. If your machine uses small horizontal-shaft engines and matches the shaft and bore sizes noted above, this kit gives a cost-effective way to restore drivetrain performance and extend equipment life.