Daelim S2-125 / Freewing 125 S2 Service Manual, 2004 (P/N SM51-0411-01E)

Daelim factory service manual for the 2004 S2-125, also known as the Freewing 125 S2, P/N SM51-0411-01E, printed November 2004. It covers engine, chassis, and electrical maintenance, diagnosis, and repair.

Searchable Service Text and Wiring Detail

Text search and diagram navigation: Service text is searchable, but there are no embedded PDF bookmarks. Small wire-color and connector labels in the full vehicle wiring diagram require zooming.

One printable 184-page PDF in English, including the front and rear covers, contents page, illustrated model page, publication page, and 10 memo pages.

Engine Overhaul, CVT Service, and Electrical Fault Finding

The following selected service topics outline the main repair areas. Other documented work includes speedometer-gear service and headlight, taillight, and turn-signal bulb replacement.

• Engine repair: Step-by-step procedures for engine removal and installation, cylinder-head and valve service, piston inspection, crankcase separation, and crankshaft-bearing replacement.

• Fuel system: CVK 116 A vacuum-carburetor disassembly, diaphragm and jet inspection, float-level checks, carburetor-insulator service, and pilot-screw adjustment.

• Lubrication: Engine-oil and filter service, oil-pump disassembly and clearance inspection, oil-radiator removal and installation, and transmission-oil checks.

• CVT and final drive: Drive-belt, movable drive face, weight roller, clutch, driven-pulley, shaft, and bearing inspection, removal, and reassembly procedures.

• Brakes and chassis: Hydraulic brake bleeding, master-cylinder and caliper repair, front-fork overhaul, steering-stem service, wheel bearings, rear suspension, and swing-arm work.

• Electrical diagnosis: Charging, CDI ignition, starter, switch, horn, and fuel-unit tests, supported by troubleshooting charts, system schematics, and the vehicle wiring diagram.

This manual suits technicians and mechanically experienced owners equipped for component measurement and electrical testing; its maintenance schedule assigns certain safety-critical inspections to qualified repair shops.

Top-End Repair and Engine Access

The SOHC top-end coverage includes camshaft and rocker-arm inspection, valve-spring measurement, valve-guide replacement, valve-seat inspection and refacing, cylinder-head assembly, cam-chain timing, and final valve-clearance adjustment.

Cylinder and piston procedures include bore measurement, ring-groove and ring-end-gap checks, piston-pin inspection, and piston/ring orientation. The cylinder-head and cylinder removal procedures specify engine removal, while camshaft and rocker-arm service can be performed with the engine installed.

External-parts instructions cover the seat, luggage box, body covers, floor panels, windscreen, fenders, muffler, and exhaust pipe. Service information, inspection criteria, and repair procedures are grouped by system, making it practical to check access requirements and the work involved before disassembly.

Carburetor and Oil-System Service

Fuel-system troubleshooting addresses starting problems, unstable idle, rich or lean running, and poor performance. The repair procedures extend through float-chamber disassembly, passage cleaning, diaphragm assembly, and carburetor reinstallation.

Oil-system coverage connects low oil level, contamination, and lubrication problems with inspection of the pump, filter, oil passages, and oil cooler. Pump inspection distinguishes body, side, and rotor-tip clearances.

Drive-System Repair and Required Tools

The CVT chapter provides component inspection limits and driven-face bearing replacement procedures. It identifies the drive-face holder, universal holder, clutch spring compressor, and lock-nut wrench required for the respective jobs.

The separate transmission/crankshaft/crankcase chapter covers the drive, counter, and final shafts, bearing inspection, crankshaft removal, and case reassembly. Bearing removers, drivers, and crankshaft assembly tools are identified alongside the work.

The manual warns that holding CVT hardware through the rear wheel or brake can damage the final-reduction system, while direct hammering on the flywheel can damage the crankshaft or related components. Piston service also flags reused piston-pin clips as a possible cause of serious engine damage.

Hydraulic Brakes, Forks, and Steering

Brake coverage includes master-cylinder cups and seals, caliper pistons and seals, and bleeding procedures with or without a brake bleeder. Front-fork work covers disassembly, spring and tube inspection, seal installation, and reassembly.

Steering procedures include race inspection and bearing adjustment. Rear-end instructions cover caliper service, wheel removal, parking-brake adjustment, rear-cushion settings, and swing-arm bearing replacement.

Electrical Tests and Visual References

Charging diagnosis covers battery condition, leakage current, generator-coil checks, and regulator/rectifier testing. Ignition diagnosis includes CDI-circuit checks, pulse-generator peak-voltage testing, ignition-coil inspection, timing checks, and the side-stand cut-off circuit.

Starter coverage separates relay and wiring faults from internal motor problems, with brush, commutator, and armature inspections. Electrical procedures identify digital, peak-voltage-adapter, and CDI test equipment.

Visual references include wire/cable routing views, charging-system and CDI ignition schematics, the starter-system schematic, switch continuity charts, and the full vehicle wiring diagram in Section 18. Exploded views support identification of CVT, starter-clutch, cylinder-head, crankcase, and chassis components.

Safety Note

Fuel-system work, hydraulic brake repair, battery service, and rotating engine components involve fire, chemical, electrical, and mechanical hazards. Follow the manual’s safety precautions, secure the vehicle correctly, isolate electrical power where specified, and use the designated service tools before beginning those repairs.

A Preview of Belt-Wear and Charging-Test Data

The CVT specifications list a standard drive-belt width of 22 mm and a service limit of 20.5 mm, alongside the belt inspection procedures.

For charging-system diagnosis, the generator charging-coil resistance specification is 0.6–1.6 Ω at 20°C. The electrical chapter pairs this test data with generator and regulator/rectifier checks.