YF300 78mm Bore Cylinder Assembly Kit, Engine Rebuild Overhaul Kit, Dirt Bike 300cc Replacement Engine Parts

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Full 78mm cylinder rebuild kit for Loncin YF300 300cc liquid-cooled engine. Includes cylinder barrel, piston, piston rings, pin and full gaskets. Ideal for engine overhaul & worn cylinder replacement.

Full Long Description (Product Detail Page)

This complete 78mm cylinder kit is specially designed for Loncin YF300 300cc liquid-cooled single-cylinder engine. When the original cylinder gets worn, scratched, suffers low compression, oil burning or power loss, this full set is the perfect overhaul solution to restore engine performance.

The cylinder barrel adopts high-grade aluminum alloy with plated cylinder liner, excellent heat dissipation, wear resistance and deformation resistance under high temperature working conditions. The matched piston, piston rings, wrist pin and circlers are precision machined to keep tight sealing, reduce oil consumption and maintain stable compression ratio.

The package comes with all necessary gaskets for cylinder installation, saving extra parts purchasing. Strict tolerance control ensures smooth piston movement, reduces friction loss and restores original power output and throttle response.

Direct replacement for stock YF300 engine. Professional engine assembly is recommended during installation. Great for enduro, trail off-road motorcycle engine repair and rebuild.

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Short Bullet Points (Preview / Social Media)

• ✅ Complete 78mm cylinder kit for Loncin YF300 300cc liquid-cooled engine
• ✅ Aluminum cylinder with plated liner, outstanding heat dissipation & wear resistance
• ✅ Full set includes cylinder, piston, rings, pin, circlips and all gaskets
• ✅ Fix common engine issues: oil burning, low compression, power loss
• ✅ Precision machining, good sealing and stable compression ratio
• ✅ Perfect all-in-one overhaul parts for YF300 off-road engine rebuild