162fmj Engine Service Manual Jun 2026

Insert each ring into the cylinder bore manually, squaring it with the piston. Measure the gap with a feeler gauge. The service limit is 0.50 mm for the top compression rings.

The 162FMJ is prized for its , featuring a longer stroke relative to its bore (typically around 62 mm x 49.5 mm). This configuration prioritizes low-to-mid-range torque over high-speed horsepower, making it exceptionally responsive in stop-and-go city traffic and capable of carrying heavy loads. Standard Specifications: Displacement: 149cc to 162cc. 162fmj Engine Service Manual

Using a calibrated torque wrench prevents stripped aluminum threads and uneven sealing pressures, which lead to permanent oil leaks. Fastener Location Thread Diameter Torque Specification Cylinder Head Nuts (M8) 28–32 Nm (21–24 ft-lbs) Cylinder Head/Base Bolts (M6) 10–12 Nm (7–9 ft-lbs) Flywheel / Rotor Nut 50–55 Nm (37–40 ft-lbs) Clutch Hub Center Nut 45–50 Nm (33–37 ft-lbs) Crankcase Case Bolts (M6) 10–14 Nm (7–10 ft-lbs) Spark Plug 15–18 Nm (11–13 ft-lbs) Oil Drain Plug 30 mm / 12 mm 20–25 Nm (15–18 ft-lbs) 7. Troubleshooting Common Issues Issue 1: Metallic Tapping/Clicking from Top End Excessive valve clearance or worn pushrod ends. Insert each ring into the cylinder bore manually,

5-Speed Constant Mesh (1-N-2-3-4-5 or All-Up/All-Down depending on application) Starter System: Kick and/or Electric Starter 2. Routine Maintenance Schedule The 162FMJ is prized for its , featuring