Lifan 1p54fmi: Service Manual

| Specification | Value / Detail | |---------------|----------------| | | Single cylinder, 4-stroke, OHV (Overhead Valve) | | Displacement | 123.7 cc | | Bore x Stroke | 54 x 54 mm | | Compression Ratio | 9.0:1 | | Idle Speed | 1,400 ± 100 RPM | | Valve Clearance (Cold) | Intake: 0.05mm / Exhaust: 0.05mm – 0.08mm | | Ignition Type | CDI (Capacitor Discharge Ignition) | | Spark Plug | NGK CR7HSA or equivalent (gap: 0.6-0.7mm) | | Oil Capacity | 1.0 Liter (without filter change) / 1.1 Liters (after overhaul) | | Primary Reduction | 3.722 (67/18) | | Transmission | 4-speed or 5-speed (varies by model; manual states N-1-2-3-4(-5)) |

Regular servicing prevents premature wear and ensures the engine performs at its peak. lifan 1p54fmi service manual

The is a 124cc engine (actual displacement is roughly 123.7cc), producing about 8-10 horsepower. It is found in popular Lifan models like the Lifan LF125 , Lifan KP150 (though that’s slightly different), and countless Chinese dirt bikes, pit bikes, and utility quads. Lifan KP150 (though that’s slightly different)

The isn’t just for repairs—it’s for performance upgrades. Advanced users use the specifications to: and countless Chinese dirt bikes