152fmh Engine Service Manual -

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Remove the right-side crankcase cover access plate to pull out the wire mesh oil strainer. Clean it with brake cleaner, blow it dry, and reinstall it.

Complete Service and Maintenance Guide for the 152FMH Engine

Measures 100–150 Ohms to ground. Ignition Coil Primary: Measures 0.4–0.6 Ohms. 152fmh engine service manual

300Ω – 500Ω

Check the level without screwing the dipstick in; the oil should sit halfway up the crosshatched section. 3. Routine Maintenance & Tune-Up Intervals Maintenance Task Interval (Hours/Miles) Specification / Action Every 10–15 hours / 500 miles Replace with 10W-40 JASO MA Valve Clearance Check Every 20–30 hours / 1,000 miles Intake: 0.05mm / Exhaust: 0.05mm Spark Plug Inspection Every 20 hours / 800 miles Gap to 0.6mm – 0.7mm Air Filter Cleaning Every 10 hours (more if dusty) Wash foam filter, re-oil Cam Chain Adjustment Inspect if engine ticking Auto-tensioning (check hydraulic spring) Valve Clearance Adjustment (Tappet Setting)

Rotate the flywheel counter-clockwise using a socket on the crankshaft nut. Align the "T" mark on the flywheel with the index notch on the crankcase. If you have a service manual or know

Before turning a wrench, verify your engine code. The code is typically stamped into the lower left side of the crankcase, near the gear shifter. Decoding the Engine Code 1 : Single cylinder 52 : 52.4mm cylinder bore F : Air-cooled by natural airflow M : Motorcycle/powersports engine H : 110cc displacement class Key Technical Data Engine Type: 4-Stroke, Single Cylinder, OHC, Air-Cooled Actual Displacement: 107cc to 110cc Bore x Stroke: 52.4mm x 49.5mm Compression Ratio: 9.0:1 or 9.1:1

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Verify the kill switch is in the "Run" position and the ignition key is on. Complete Service and Maintenance Guide for the 152FMH

Proper disassembly and assembly are critical. Always work in a clean, organized space.

Place an oil pan under the engine. The drain bolt is a 17mm bolt located on the flat bottom of the crankcase. (Caution: Do not confuse it with the angled 14mm timing chain tensioner bolt nearby).

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Regular fluid changes and checks prevent premature wear on the integrated transmission and wet clutch system. Oil Specifications

Over-tightening bolts in the soft aluminum casings of these engines is a common mistake.