2006 CFMOTO CF500 / CF500-A ATV Factory Service Manual (First Edition)

Factory service manual for the 2006 CFMOTO CF500 and CF500-A ATVs with the CF188 engine, published by Chunfeng Holding Group Co. Ltd., First Edition, August 2006. Coverage distinguishes the single-seat CF500 from the two-seat CF500-A with its longer wheelbase. The file also contains circuit and wiring diagrams and a CF500 4x4 owner's manual.

Search, navigation, and wiring detail: Text in the service manual is searchable; the owner's manual does not provide reliable text search, and the large wiring sheets have no searchable diagram labels. Bookmarks link to the service chapters, wiring section, and owner's manual; the “Return” bookmark is inactive. Small labels on the large wiring sheets are readable when enlarged, while some labels in the owner's manual's reduced wiring diagram remain difficult to read.

• CF188 engine repair: Engine removal and installation, cylinder-head overhaul, valve-clearance adjustment, camshaft inspection, piston and crankshaft measurements, and timing-chain installation.

• CVT and transmission: Drive-belt replacement, centrifugal-clutch inspection, primary and secondary sheave overhaul, shift-fork checks, and output bevel-gear adjustment.

• MIKUNI fuel system: BSR36-89 carburetor disassembly, diaphragm and needle-valve inspection, float-height and fuel-level adjustment, plus starting and running-fault diagnosis.

• Cooling and lubrication: Cooling-system pressure tests, thermostat and fan checks, water-pump seal replacement, oil-pressure testing, and oil-pump inspection.

• Chassis and brakes: Constant-velocity drive-shaft inspection, steering-stem service, suspension-arm and shock-absorber replacement, and hydraulic-disc-brake component checks.

• Electrical diagnosis: AC magneto, regulator/rectifier, CDI ignition, pickup-coil and starter tests, with wiring diagrams and switch-continuity tables.

The workshop sections suit mechanics familiar with engine repair and precision measuring tools; the owner's manual covers operation and routine care and reserves certain adjustments and brake work for trained service personnel.

CF188 Engine Inspection and Reassembly

The engine chapters cover cylinder-head and valve inspection through crankcase separation, crankshaft installation, and balancer-shaft alignment. Periodic maintenance tables sit alongside component torque tables, fluid capacities, wear limits, and clearance specifications.

The camshaft's automatic decompression assembly is inspected as a unit and is not serviceable internally. Tool lists identify the crankcase separator, crankshaft installation set, valve-spring compressor, and other equipment required for internal engine work.

CVT Wear Checks and Bevel-Gear Setup

Drive-belt measurements and clutch-shoe inspection criteria help determine whether those parts can be reused or need replacement. Clutch engagement and lock-up checks add diagnostic context when investigating slipping or poor drive take-up.

Bevel-gear repair coverage includes backlash measurement, shim adjustment, and tooth-contact pattern views for the engine-output gears. Front and rear axle assemblies have separate removal and installation coverage.

The secondary-sheave assembly notes address the risk of damaging the oil-seal lip during assembly. Sheave-holder and spring-compressor requirements are identified alongside the component procedures.

Carburetor, Cooling, and Lubrication Diagnosis

The MIKUNI section distinguishes float-height measurement from fuel-level checking and covers the vacuum diaphragm, starter plunger, and matched needle-valve and seat components. Troubleshooting tables connect starting, idling, and higher-speed symptoms with the relevant fuel-system checks.

Cooling-system charts support pressure testing, coolant air removal, and water-pump repair. Pump inspection separates mechanical-seal leakage from oil-seal faults; the lubrication sections cover the oil pump, relief valve, and pressure checks.

Steering, Suspension, and Brake Service

Chassis coverage includes wheel hubs, steering bearings, tie rods, suspension ball pins, shock absorbers, and brake discs and calipers. Constant-velocity drive-shaft coverage provides removal, inspection, and installation information.

Securely support the ATV for chassis work, and keep fuel-system service in a ventilated area away from ignition sources.

Ignition, Starting, and Wiring References

Electrical sections cover lighting, instrumentation, charging, electric-starter inspection, and recoil-starter service. Ignition-system diagrams, cable-routing drawings, and connector test tables support fault tracing, including 2WD/4WD/differential-lock switch circuits.

The ignition chapter warns that connecting or disconnecting components with the ignition on can damage the CDI circuit. Peak-voltage testing also identifies the required adapter and meter equipment.

CF500 Owner's Manual and PDF Contents

The included owner's manual covers the single-seat CF500 4x4, with operating controls, pre-ride checks, lubrication schedules, storage, and troubleshooting. This printable English file is a 402-page PDF: 254 service-manual pages, including 3 opening pages; 2 additional circuit/wiring-diagram sheets; and a 146-page owner's manual, including 6 opening pages and its final wiring diagram. All sections are included in the total.