The OHV design requires periodic valve lash adjustment (typically every 2,000 km). The manual specifies the exact cold gap: Intake: 0.05mm - 0.08mm, Exhaust: 0.08mm - 0.10mm. Guessing here leads to hard starting or burnt valves.
Adherence to the following schedule is required to ensure engine longevity. lifan 1p54fmi service manual
Procedure:
The 1P54FMI uses a wet multiplate clutch. The OHV design requires periodic valve lash adjustment