NGK CR7HSA or C7HSA (Gap: 0.6mm – 0.7mm / 0.024" – 0.028") Valve Clearance (Cold): Intake: 0.05mm (0.002") Exhaust: 0.05mm to 0.07mm (0.002" to 0.003") 3. Step-by-Step Maintenance Procedures Periodic Valve Adjustment
4-speed constant mesh (Standard patterns: N-1-2-3-4 or All-Up)
Gently tap the cylinder head with a rubber mallet to break the gasket seal and slide it off the cylinder studs. 152fmh engine service manual
Unlike cars that have a spin-on filter, the 152FMH uses a centrifugal oil filter rotor inside the right crankcase cover. The service manual dedicates an entire page to cleaning this rotor. If you don't clean the hardened sludge out of this rotor every 5,000 km, oil flow stops, and the camshaft welds itself to the head.
The is a widely used 110cc, 4-stroke, air-cooled horizontal engine common in pit bikes, dirt bikes, and small ATVs. While a single "official" manual may vary by vehicle manufacturer, the standard service procedures for this engine type are well-documented across several technical resources. Core Engine Specifications NGK CR7HSA or C7HSA (Gap: 0
If you’re rocking a bike with the 152FMH engine, you know the documentation is often missing or hard to read. I just uploaded a clean copy of the official service manual.
While a single, dedicated "152FMH engine service manual" may not exist, the information you need is still readily available through a combination of resources. The engine's status as a clone of the Honda CG125 means that the vast knowledge base for that legendary engine directly applies, and the Honda CG125 service manual is the best possible document to use for maintenance and repair. By following the correct procedures, using quality parts, and adhering to a strict maintenance schedule, your 152FMH engine will provide many thousands of miles of reliable and economical service. The service manual dedicates an entire page to
JASO MA/MA2 certified 10W-40 4-stroke motorcycle oil (do not use automotive oil with friction modifiers, as it will cause the wet clutch to slip).
If you want, I can:
Insert a 0.05mm feeler gauge between the valve stem and the rocker arm adjuster screw.
