Vashly Go-Kart Centrifugal Clutch 12T 3/4" Bore for #35 Chain — Iron, Includes Mounting Hardware

The Vashly 12-tooth centrifugal clutch with a 3/4" bore is a bolt-on power-transfer clutch designed to engage small horizontal shaft engines to #35 chain drivetrains for go-karts, minibikes and fun karts.

This compact centrifugal clutch provides a simple, durable way to connect common small engines (including Predator 212 and many Honda GX variants) to a chain-based final drive. Built from iron for heat dissipation and wear resistance, it accepts a 3/4" shaft with a 3/16" keyway and mates to #35 chain sprockets via its 12-tooth profile. The package includes mounting hardware so you can install it on many hobby and light utility builds without hunting down extra bolts.

How does the Vashly clutch engage and protect the engine on startup?

The Vashly clutch uses centrifugal shoes that move outward as engine speed rises, engaging the drum and pulling the sprocket to turn the chain only after rpm passes the engagement threshold. That gradual engagement reduces shock loads to the crank and drivetrain compared with direct coupling. It also helps the engine idle without driving the wheels, useful for stalling prevention and smooth low-speed operation.

• 12-tooth drum designed for #35 chain compatibility
• Centrifugal engagement smooths load transfer during acceleration
• Allows engine to idle without propelling the machine
• Iron construction helps dissipate heat from slipping or repeated engagement

Which engines and machines will this clutch fit?

This clutch fits engines with a 3/4" crank shaft and a 3/16" keyway, including many common small engines and clone units. It’s commonly used on Predator 212cc conversions, Honda GX160/GX200/GX140/GX120 series, many 5.5–6.5 HP clone motors, and several Briggs/Tecumseh variants. Always verify shaft diameter and keyway before buying to ensure proper fit.

• Compatible with Predator 212 and many clone engines
• Fits Honda GX160, GX200, GC160, GC190 and similar models
• Works with most 4–7 HP motors that use a 3/4" shaft and 3/16" keyway
• Commonly used on go-karts, minibikes, hand-built fun karts and small utility rigs

What hardware and build quality does the clutch include?

The clutch arrives with the mounting bolt set, washers and the necessary Allen wrench, so you can mount it immediately without sourcing extra fasteners. Its iron housing offers improved wear resistance and faster heat dispersion than some low-cost alloys, which helps when the clutch experiences brief slippage during startup or heavy acceleration. The 12 teeth are machined to fit #35 chain sprockets and tolerate routine recreational use.

• Comes with 2 clutch bolts, 2 washer kits and 2 screw wrenches included
• Iron construction for improved durability and heat dissipation
• 12-tooth profile milled for standard #35 chain mesh
• Supplied hardware makes installation straightforward

How do I check fit and maintain the centrifugal clutch for longevity?

Before installing, measure your engine’s crank shaft diameter and keyway size to confirm a 3/4" shaft with a 3/16" keyway. During break-in and early use, avoid prolonged slipping and check mounting bolts and chain alignment regularly. Periodic inspection of the shoes and drum for glazing or wear keeps engagement consistent and extends service life.

• Verify 3/4" shaft and 3/16" keyway before purchase
• Ensure chain alignment and proper tension after installation
• Inspect shoes/drum for glazing or overheating signs every few rides
• Retighten mounting hardware after initial run-in and periodically thereafter

Who is this for: The Vashly 12T 3/4" bore centrifugal clutch is aimed at hobbyists, fabricators and small-engine modifiers building or repairing go-karts, minibikes, pocket bikes and light utility machines. It’s a practical choice for anyone adapting horizontal shaft engines (Predator, Honda clones and similar) to a #35 chain drive who wants a simple, bolt-on clutch with included hardware. If you need a different bore, tooth count, or a clutch rated for heavy industrial loads, choose a model designed specifically for those requirements.