Motorcycle Starter Drive Clutch Large Tooth Screw Assembly for 50cc 70cc 90cc 110cc ATV Quad Go Kart Karting Pit Dirt Bike

Motorcycle Starter Drive Clutch Large Tooth Screw Assembly for 50cc 70cc 90cc 110cc ATV Quad Go Kart Karting Pit Dirt Bike
- Wide Displacement & Vehicle Compatibility Specially designed for 50cc, 70cc, 90cc, 110cc horizontal four-stroke engines, widely fits pit bikes, dirt bikes, ATV, quad bikes, go-karts, buggies and most Chinese off-road mini motorcycles as direct OEM replacement starter clutch assembly.
- Reliable One-Way Overrunning Starting Function Integrated one-way roller bearing structure enables the starter motor to crank the engine during startup, then automatically slips and disengages once the engine fires; prevents reverse rotation damage to starter motor and gears, solving startup slipping, hard starting and starter free-spinning faults.
- High Hardness Wear-Resistant Steel Gear Outer sprocket gear made of quenched high-carbon steel with precision tooth machining, strong impact resistance and anti-wear performance; resists tooth stripping, deformation and abrasion from frequent startup cycles for long service life.
- Precision Matched Mounting Structure Pre-drilled mounting hole layout perfectly matches original engine crankcase installation position, inner bore tolerance precisely fits crankshaft journal; no reaming, cutting or modification required for seamless assembly.
- Direct Replacement To Fix Common Startup Issues Perfect replacement for worn, slipping, broken original starter clutches that cause slow cranking, starter spinning without turning engine, or startup failure. Straightforward disassembly & installation for engine top-end overhaul and routine starter system repair. Tip: Please check the size drawing carefully before purchase; you can view the reference link & related installation video for confirmation.

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