A high-quality service manual for this engine is typically between 80 and 150 pages. It is divided into logical chapters. When searching for a PDF or physical copy, ensure it contains these ten critical sections:
Many riders convert the 162FMJ to a 183cc (Moderate) or 212cc (Extreme). Using the manual's cylinder stud spacing (typically 62mm center-to-center), you can determine if a 67mm piston will fit. The manual’s coolant jacket depth tells you how much you can safely bore. 162fmj Engine Service Manual
Using the manual’s troubleshooting section, here is how to solve the top three complaints about this engine: A high-quality service manual for this engine is
| Symptom | Likely Cause (Per Manual) | Repair Reference (Page #) | | :--- | :--- | :--- | | Hard starting hot | Intake valve clearance too tight (0.00mm gap). | Valve adjustment section. Set to 0.06mm Intake, 0.08mm Exhaust. | | Knocking on deceleration | Connecting rod big end bearing wear. | Crankcase split procedure; measure rod side play (0.3mm max). | |Oil leaking from breather tube| Overfilled oil or collapsed piston ring. | Compression test (min 120psi). Ring replacement section. | | No spark after storing | Stator trigger coil corrosion. | Ignition coil resistance test. Replace if less than 150 Ohms. | Using the manual's cylinder stud spacing (typically 62mm
Because the 162FMJ is a "clone" engine, finding a single "official" manual is tricky. Here is your sourcing strategy:
Using the manual's feeler gauge spec, slide the gauge between the valve stem and rocker arm. Loosen the locknut, turn the adjuster screw until you feel slight drag, tighten the locknut, and re-check. The manual emphasizes "Cold engine only."