Vashly Centrifugal Clutch 3/4in Bore 10T — Cast Iron, Fits Predator 212 & #40/#420 Chain

Vashly's 3/4" bore, 10-tooth centrifugal clutch is a durable transmission component engineered to engage engines from 2 to 6.5 HP and drive #40/#41/420 chain for minibikes, go karts, and similar small engine projects.

This clutch is built for DIY enthusiasts and small-vehicle builders who need a reliable, replaceable centrifugal drive that mounts to standard 3/4" crankshafts. Made from cast iron for strength and heat dissipation, the unit includes fasteners for installation and fits many popular horizontal shaft gasoline engines such as Predator-style 212 models. It’s intended for single-wheel drive applications and works with tires up to about 15" tall; chain and sprocket must be matched separately.

How does the Vashly 10T centrifugal clutch transfer power?

The clutch uses centrifugal weights that engage as engine rpm rises, pressing friction surfaces outward to turn the 10-tooth sprocket. At idle the shoes remain retracted so the wheel or driven sprocket stays stationary, allowing smooth takeoffs and easier idling without stalling.

• Engagement at higher RPM via centrifugal mechanism for smoother starts.
• 10-tooth sprocket compatible with #40, #41 and #420 chain pitches.
• 3/4" keyed bore for mounting to common small-engine crankshafts.
• Bi-directional mount — can face inward or outward on the crankshaft.

What engines and vehicles will this clutch fit?

It’s sized for 2–6.5 HP gasoline engines running around 2300 RPM and is commonly used on Predator 212 clones, small horizontal-shaft engines, minibikes, fun karts, and garden equipment that use single-wheel drive. Confirm crankshaft diameter and keyway before fitting; sprocket chain and driven sprocket are not included.

• Works with Predator-style 212 and other 2–6.5 HP horizontal shaft engines.
• Ideal for minibikes, go karts, mini choppers, and sport karts.
• Designed for single-wheel drive setups with tires ≤15" tall.
• Does not include chain or driven sprocket; match to #40/#41/420 chain.

What materials and hardware are included, and how hard is installation?

The clutch body is cast iron for wear resistance and thermal performance, with internal components designed for dependable torque transfer. Vashly supplies a bolt and washer kit plus two mounting bolts and simple tools to secure the clutch to the crankshaft end; basic mechanical skills and common hand tools are all that’s required for installation.

• Cast iron construction for rigidity, wear resistance, and heat dissipation.
• Package includes 1× 3/4" 10-tooth clutch, 2× clutch bolts, 2× washers, 2× wrenches.
• Mounts using the included bolt and washer on the crankshaft end; can be oriented either way.
• Simple installation — requires basic tools and verification of shaft/key size.

How should I check fitment before buying?

Measure your engine crankshaft diameter and confirm you require a 3/4" keyed bore clutch. Verify the number of teeth and chain pitch needed for your drive train, and ensure your vehicle’s tire diameter and application match the single-wheel drive design. If in doubt, compare dimensions and ask the seller for clarification.

• Confirm crankshaft is 3/4" and has the appropriate keyway.
• Match sprocket teeth and chain pitch (#40/#41/420) to your existing drive chain.
• Ensure engine horsepower is between 2–6.5 HP and typical RPM near 2300.
• Single-wheel drive only; check tire diameter (recommended ≤15").

Who is this for: Builders, hobbyists, and repairers who work on minibikes, go karts, mini choppers, or small garden machines and need a robust, affordable centrifugal clutch to restore or upgrade a single-wheel drive system. It’s a practical replacement for small engines where a 3/4" bore centrifugal clutch with a 10-tooth sprocket and #40/#41/420 chain compatibility is required.