2006 Keeway ARN125 / ARN150 Scooter Service & Repair Manual

The February 2006 Keeway Scooter Service and Maintenance Manual covers the 2006 ARN125 and ARN150. It starts with four-stroke engine theory and work-cycle illustrations before moving into mechanical repair and electrical diagnosis.

Text search and diagram detail: Body text is searchable, but some diagram labels are not. There are no embedded PDF bookmarks. Small wiring labels require enlargement; the charging diagram is pixelated but readable when enlarged.

• Engine repair: Engine disassembly and reassembly, cylinder-head and piston work, camshaft timing, valve-clearance adjustment, compression testing, and oil-pump service.

• CVT and starting mechanisms: Driver wheel disc, driven wheel disc clutch, transmission case, kick starter, and one-way starter clutch, termed the “super clutch.”

• PD24JC carburetor: Removal, internal disassembly, reassembly, float-height checks, electric enrichment operation, and idle-mixture adjustment for the vacuum-piston carburetor.

• Suspension and brakes: Front fork and shock-absorber service, master-cylinder and caliper disassembly, hydraulic disc-brake bleeding, and rear drum-brake assembly.

• Electrical diagnosis: Magneto and ignition-coil tests, CDI fault checks, ignition-timing inspection, battery charging tests, wiring diagrams, and switch-continuity charts.

• Fault isolation: Symptom-based charts for hard starting, low power, unstable idle, poor high-speed running, handling problems, and electrical starting faults.

The manual is suited to mechanics comfortable with engine disassembly and electrical measurements; its maintenance schedule reserves several operations for dealer service.

Engine, CVT, and Starter Repair

The engine sections document cylinder-head removal, valves and springs, camshaft and rocker assemblies, piston-ring installation, and crankcase separation. Valve-clearance setup views and cylinder-pressure testing accompany the mechanical work, with tables for piston, cylinder, valve-guide, and camshaft dimensions.

Transmission repair coverage extends to pulley components, clutch shoes and springs, shaft bearings, oil seals, and reduction gears. Exploded assembly views identify the driven wheel disc clutch and kick-starter components, while the power-transfer chart traces the kick-start drive.

The oil-pump section details the rotor, sprocket, and drive-chain assemblies alongside a lubrication-system diagram. Crankcase instructions also identify the risk of case damage from metal-hammer impacts during separation or assembly.

PD24JC Fuel-System Service

Carburetor documentation explains the float and needle valve, main and idle circuits, and electric enrichment valve. The working-principle illustrations and fuel-consumption curve accompany removal, cleaning, reassembly, and adjustment procedures.

Reference data cover jet sizes, float height, and mixture settings. The adjustment section warns that excessive tightening can damage the mixture screw.

Front Suspension and Brake Service

Front shock-absorber documentation covers the spring, piston rod, guide bush, oil seal, and oil refill. A section view explains compression and rebound damping. Separate assembly instructions address the steering bearings, front and rear wheels, and muffler.

The brake sections contain master-cylinder and caliper component views, seal-related service notes, and bleeding procedures. Rear brake coverage includes the shoes, cable, return spring, operating arm, and camshaft.

Observe the manual’s precautions for flammable fuel, brake fluid, and battery electrolyte.

Ignition, Charging, and Fault Diagnosis

The electric wiring diagram covers the ignition and starting circuits; a separate AC charging-system diagram shows the magneto, rectifier, battery, and switch connections. An electrical-starting process chart and switch-continuity tables support circuit tracing.

Magneto stator removal and installation are covered, together with coil-resistance checks and battery charging-current data. CDI coverage concerns diagnosis and replacement, not internal module rebuilding.

The fault-inspection charts connect symptoms with fuel-delivery, ignition, and mechanical causes. For a hard-starting engine, they help distinguish fuel-supply problems, weak spark, and low compression before repair work is chosen.

Workshop Reference Data and Maintenance

Component-specific torque tables accompany engine and chassis work. The special-tool list identifies a flywheel removal tool (T03), valve-spring tool (T04), cylinder-pressure gauge (T06), and clutch clamp (T10). Pre-delivery checks and the periodic maintenance schedule cover routine inspection and service.

Some specifications differ between tables and procedure pages, including compression pressure, valve clearance, and ignition timing.

English PDF and Page Breakdown

One printable English-language PDF contains 84 pages, including the original cover, two contents pages, and three section dividers. Printed pagination runs from 1 to 85, with page 2 absent.