The (often referred to as a CG150 derivative) is a ubiquitous 149cc–150cc, 4-stroke, air-cooled, single-cylinder engine widely used in Chinese motorcycles, pit bikes, ATVs, and small utility vehicles. Known for its vertical orientation (offering better cooling and power) and reliable pushrod design, it is a popular, cost-effective engine.
Disclaimer: Always refer to the specific manual for your engine's serial number. Variations exist between manufacturers. 162fmj Engine Service Manual
Because the 162FMJ is an OHV pushrod engine, the thermal expansion of the long metal rods changes valve lash dramatically as the engine heats up. Setting correct clearances when the engine is is critical for performance and component longevity. Valve Clearance Specs (Cold) Intake Valve: 0.05 mm (0.002 inches) Exhaust Valve: 0.08 mm (0.003 inches) Step-by-Step Adjustment Procedure: The (often referred to as a CG150 derivative)
Remove the carburetor to clean the main jet and pilot jet if the engine struggles to idle or accelerate. 4. Troubleshooting and Repairs 4.1. Engine Will Not Start Variations exist between manufacturers