1PZ Centrifugal Clutch for Go-Kart & Mini Bike 3/4" Bore 12-Tooth with #35 Chain, Keyed 3/16"

The 1PZ AP2-12T is a 12-tooth centrifugal clutch with a 3/4" bore and included #35 chain, designed as a drop-in replacement for many small engine go-karts and mini bikes.

This clutch assembly pairs a 12-tooth sprocket with a standard #35 roller chain and a 3/4" (0.75") keyed bore, making it compatible with a wide range of small engines and popular engine clones. It’s engineered to engage automatically as engine RPM rises, transmitting power to the driven sprocket without a manual lever. The AP2-12T is offered to match commonly used OEM parts on engines such as Honda GX-series, Predator clones, and many Tecumseh/Briggs & Stratton equivalents.

Will this clutch fit my engine and shaft?

This 1PZ clutch fits engines that have a 3/4" crankshaft with a 3/16" keyway. It replaces clutches on many 4–7 HP engines and several popular models and clones.

• 3/4" bore with 3/16" keyway for secure keyed mounting.
• Compatible with Honda GX160, GX200, GX140, GX120, GC160, GC190 replacements.
• Works with Harbor Freight Greyhound 196cc and Predator 212cc clone engines.
• Fits many Tecumseh, Briggs & Stratton and common 5.5–6.5 HP clones.

How does the AP2-12T clutch affect performance on a go-kart or mini bike?

The centrifugal mechanism engages progressively as RPM climbs, offering smooth power transfer for acceleration without manual intervention. The 12-tooth sprocket and #35 chain balance torque delivery and durability for recreational vehicles and light-duty applications.

• 12T sprocket for reliable chain engagement and moderate top-speed gearing.
• #35 roller chain provides a durable, widely available drive option.
• Centrifugal engagement reduces stalling and simplifies starts.
• Construction suited for typical recreational loads and occasional heavier use.

What installation and maintenance steps should I expect?

Installation is straightforward if your engine shaft and keyway match the clutch specifications; basic hand tools and proper torque on the retaining nut are required. Routine inspection of chain tension and clutch surface wear keeps the system functioning safely.

• Slide clutch onto keyed 3/4" shaft, align key, and secure with proper nut torque.
• Check chain tension and realign sprockets to prevent premature wear.
• Inspect clutch shoes and drum for glazing or uneven wear periodically.
• Replace chain and fasteners if corrosion or stretching is evident.

Can this clutch replace parts on popular clone engines and OEM models?

Yes — the AP2-12T was designed to be compatible with a broad set of small engines and clones used in off-road and utility recreational machines. Confirm shaft diameter and keyway size before ordering for a smooth swap.

• Direct replacement for many Honda GX and GC series small engines.
• Fits common Harbor Freight and Predator clone engines of similar crank dimensions.
• Suitable for Tecumseh and Briggs & Stratton style applications where shaft specs match.
• Contact the seller if you're unsure about fitment for unusual or modified shafts.

Who is this for: The 1PZ AP2-12T is intended for hobbyists, go-kart builders, mini bike owners, and small-equipment repairers who need a reliable, readily available replacement centrifugal clutch with a 3/4" keyed bore and #35 chain. It’s ideal when you want a straightforward install, broad compatibility with popular small engines and clones, and robust everyday performance for recreational vehicles and light utility use.