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The Lifan is a widely used 125cc, 4-stroke horizontal engine found in various pit bikes and motorcycles. While a single official "service manual" specifically for this engine code is rarely available as a standalone document, maintenance follows the standard procedures for Lifan’s 125cc air-cooled engines. Engine Specifications Engine Type Single-cylinder, 4-stroke, air-cooled Displacement 125cc (approx. 11.7 hp) Gear Pattern N-1-2-3-4 (4-up or all-up) Clutch Manual (standard) or Semi-automatic options Chain/Sprocket 428 chain with 15T sprocket Core Maintenance Procedures