162fmj Engine Service Manual [verified]

Inspect the rocker arm faces and pushrod ends for pitting, discoloration, or bending. Cylinder & Piston

Before discussing the manual, let’s understand the machine. The "162FMJ" is an engine code derived from Chinese manufacturing standards (commonly following the Qingqi/Zongshen/Loncin patterns).

: Re-adjust valve clearance. Inspect pushrods for straightness by rolling them on a flat glass surface. If you need specific help with a repair, tell me:

The 162FMJ typically utilizes a PZ27 or standard 27mm slide carburetor. 14 mm to 15 mm

: 0.05 mm (Some manuals allow up to 0.08 mm for heavy-duty use). 162fmj Engine Service Manual

Drain the engine oil and remove the exhaust pipe, carburetor, spark plug, and top engine mounts.

Start the engine and let it warm up to normal operating temperature (approx. 5–10 minutes of riding).

Interestingly, the is also a tuning bible. The specifications reveal the limitations of the stock engine.

Carburetor needle or main jet is clogged, causing an incorrect air-to-fuel ratio. Inspect the rocker arm faces and pushrod ends

The 162FMJ engine is usually paired with a . Correct jetting ensures easy cold starts, a smooth idle, and crisp throttle response. Standard Factory Settings Idle Speed: 1,400 ± 100 RPM

Kick-start, electric start, or a combination of both. Critical Torque Specs Cylinder Head Bolts: 28–32 Nm (20–23 ft-lbs) Cylinder Base Nut: 20–24 Nm (14–17 ft-lbs) Flywheel/Rotor Nut: 50–55 Nm (36–40 ft-lbs) Clutch Hub Nut: 45–50 Nm (33–36 ft-lbs) Oil Drain Plug: 15–18 Nm (11–13 ft-lbs) Spark Plug: 12–15 Nm (9–11 ft-lbs) 2. Routine Maintenance Procedures

Reinstall the screen (closed end pointing inward), followed by the spring and the plug. Torque to . Servicing the Centrifugal Filter (Every 4,000 km)

Key data points for the 162FMJ engine to assist in parts identification and tuning: Displacement : 149.4 cm³. Bore × Stroke Compression Ratio Maximum Power : 8.2 kW to 8.5 kW at 8,500 rpm. : CDI (Capacitor Discharge Ignition) with a spark plug. Transmission : 5-speed manual with a wet multi-plate clutch. Valve Clearance (Cold) : 0.05 mm. : 0.08 mm. Alibaba.com 2. Routine Maintenance Schedule : Re-adjust valve clearance

62.0 mm × 49.5 mm (hence the designation "62" in 162FMJ). Compression Ratio: 9.0:1 to 9.2:1 Cooling System: Natural air-cooled.

Change engine oil, clean oil strainer screen, check valve clearances.

Install rings with the stamped markings (e.g., "T" or size marks) facing up . Space the ring gaps 120 degrees apart so they do not line up.