FDJ Centrifugal Clutch 5/8" Bore 12-Tooth for 35 Chain — Iron, Bolt Kit, Fits 2.8–6.5HP Engines

FDJ Centrifugal Clutch with a 5/8" bore and 12 teeth is a drop-in replacement clutch designed to transfer power reliably to a 35 chain on small go-karts and minibikes.

This centrifugal clutch is engineered for hobbyists and repair technicians who need a durable, OEM-quality replacement for minibikes, go-karts, and light utility engines. Made from high-strength iron and supplied with a metric class 8.8 bolt and washer kit, it fits a wide range of horizontal shaft engines and offers consistent engagement across low- to moderate-horsepower drivetrains.

Which engines and vehicles will this clutch fit?

The FDJ clutch is compatible with many 2–6.5 HP horizontal-shaft engines and common minibike models. It suits popular Honda and Honda-clone engines as well as Briggs & Stratton and Tecumseh applications when using a 5/8" shaft.

• Common fits: GC160, GC190, GX120, GX140, GX160, GX200 engines.
• Baja minibikes: MB165, MB200, Baja Heat, Mini Baja, Baja Warrior (Baja part 165-046).
• Also used on 163cc (5.5 HP) and 196cc (6.5 HP) small engines.
• Designed for 35 roller chain drive systems with a 12-tooth sprocket interface.

How does the clutch engage and protect the engine?

This is a centrifugal-style clutch that engages progressively as engine RPM increases, reducing shock to the drivetrain and making launches easier. Engagement is automatic and self-adjusting under centrifugal force.

• Progressive engagement reduces sudden torque spikes to the chain and sprocket.
• Iron construction provides heat dissipation and wear resistance during repeated starts.
• 12-tooth sprocket spacing matches standard 35-series chain for positive drive.
• Includes bolt and washer for secure mounting on the crankshaft end.

What hardware and build quality come with the clutch?

FDJ supplies a metric property class 8.8 bolt and washer so the unit mounts directly to the crankshaft without sourcing extra parts. The clutch body is cast iron for a balance of strength and thermal performance.

• Included: class 8.8 bolt and washer kit for immediate installation.
• Material: durable iron for long wear life and efficient heat rejection.
• Designed for portability and lightweight operation while keeping structural strength.
• Manufactured to OEM-replacement tolerances for reliable fitment.

Who is this for? This FDJ centrifugal clutch is aimed at DIY mechanics, go-kart and minibike restorers, and small-engine operators who need a reliable, affordable replacement for worn or damaged clutches. It’s ideal when you want an OEM-style, direct-fit part for 5/8" shafts and 35-series chain systems on engines around 2.8 to 6.5 HP and popular 97cc–196cc small engines.