Faulty spark plug, bad ignition coil, or defective CDI unit.
4-Stroke, Single Cylinder, Overhead Valve (OHV) Displacement: Bore x Stroke: Cooling System: Air-Cooled Lubrication: Pressure/Splash Starting Method: Electric and Kick-starter Max Power: ~8.1 kW (11 HP) @ 8000 RPM Max Torque: ~9.1 Nm @ 7500 RPM Clutch: Manual, Wet Multi-plate 2. Routine Maintenance Schedule
Measure ring end gap by pushing the ring 10mm down into the cylinder bore. Replace rings if the gap exceeds 0.50 mm. 5. Torque Specifications
To demonstrate the value of the 162FMJ Engine Service Manual, let’s walk through a theoretical top-end rebuild. A generic YouTube video skips the details; the manual forces you to check them. 162fmj Engine Service Manual
: 4-stroke, single cylinder, air-cooled OHV (push rod). Bore x Stroke : Displacement : Approximately Compression Ratio : Valve Clearance (Cold) : for both intake and exhaust. Idle Speed : Maintenance Essentials
: Valve clearance too tight (valves staying slightly open, losing compression). Fix : Check and adjust valve clearance to 0.05 mm. Cause : Choke cable broken or misadjusted. Fix : Verify the choke butterfly valve closes fully. Issue 2: Blue Smoke from Exhaust Cause : Worn valve guide seals or worn piston rings.
Remove the clutch basket, plates, and springs. Faulty spark plug, bad ignition coil, or defective CDI unit
and Zongshen. It is widely used in commuter motorcycles, dirt bikes, and ATVs due to its simple overhead valve (OHV) design and reliability. 1. Core Technical Specifications
Lift the cylinder head off the engine block. Remove the cylinder block (barrel) by sliding it upward off the cylinder studs. Take care not to let the piston slam against the studs.
Standard clearance is 0.010–0.040 mm. A clearance greater than 0.10 mm requires a top-end rebuild. Replace rings if the gap exceeds 0
The 162FMJ engine is incredibly forgiving, but it requires regular intervention to prevent premature wear. Follow this standard timeline to keep the engine in peak condition: 1. Every 1,000 km (or 600 miles)
Run for 3-5 minutes to allow the oil to drain freely.
Drain the engine oil. Remove the exhaust pipe, carburetor, spark plug, and upper engine mounting brackets.