2006 Keeway ARN125 / ARN150 Service Manual (84 P.)

Complete service documentation for ARN125/150 scooters addressing engine torque specs, transmission assembly, valve clearance adjustment, carburetor setup, and electrical system diagnostics with troubleshooting procedures.

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Document Details

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Document Number / Seller:
23722 / Edward King
File Size:
7.08 MB
File Type:
PDF
Language:
English
Pages:
84
Printable:
Yes
Category:
Scooter
Last updated / verified
Oct 23, 2025

Models Covered & Key Technical Specifications

Keeway ARN125, ARN150 — 2006 Mechanical Industrial Repository | ARN Series Segment.

  • Calibrated Climate Specs: 13±1 kg/cm² is standardized to the combustion chamber compression pressure Threshold.
  • Prescribed Heat Dissipation: For optimal cooling performance, 100±2 ml defines the front absorber fluid capacity Requirements.
  • System Linear Velocity: Throttle engagement achieves 0.6~0.7 mm spark plug electrode gap Mapping.
  • Documented Scan Resolution: The carburetor throat tube requires 24 mm diameter for atomization Configuration.
  • Defined Liquid Volume: Fuel float chamber reaches 13±1 mm height setting Benchmarks.
  • Nominal Generation Capacity: Battery storage sets 7.0 Ah nominal rating for electrical system Range.

Professional Workshop Service Manual & Technical Specifications

Multi-System Instructional Manual: Scooter Keeway ARN125, ARN150 Scooter 2006 - Comprehensive Service & Repair Guide Repair-Index

System-Identifier: ARN125 (2006), ARN150 (2006) // Reference-Category: Technical documentation for engine and transmission system logic // Architecture-Focus: Complete service procedures and component specifications.

Assessment-Parameter Diagnostic-Logic Documentation Status
Engine systems Four-stroke operation and component assembly Complete specifications provided
Transmission and clutch Power transfer and gear shifting mechanisms Chapter references with assembly sequence
Fuel and ignition Carburetor operation and electronic systems Functional diagrams and test procedures included
Brake and suspension Hydraulic and mechanical brake systems System principles and maintenance intervals documented
Electrical components Magneto, battery, and starting systems Specifications and testing protocols detailed

Following OEM groupings, the manual includes chapters addressing engine removal and installation, transmission case assembly and component positioning, electrical system testing and CDI diagnostics, brake system principles and maintenance procedures, and periodic service intervals through 12,000 kilometers.

Appropriately establishing a foundation in technical fundamentals, the document provides engine terminology, four-stroke work cycles, and workshop safety protocols. The repository is divided into sections covering engine and transmission specifications with detailed torque documentation for securing fasteners throughout the drivetrain. Technical notes are provided for special service tools required for bearing installation, oil seal positioning, and crankcase assembly procedures. Quality checks are addressed for cylinder pressure measurement, valve clearance verification, and ignition timing inspection across idle and high-speed operating conditions. The fuel system section documents carburetor operation principles including inlet, condensing, idle, slow-speed, and high-speed fuel supply circuits, alongside removal and installation procedures with adjustment steps for mixture ratio optimization.

The troubleshooting chapter addresses engine starting failures, power delivery concerns, unusual noise conditions, electrical system faults, and brake performance issues through systematic diagnostic sequences. Cooling system maintenance is addressed in sections covering lubrication system pathways, oil pump operation, and component circulation routes for crankshaft, camshaft, and transmission element lubrication. The document includes wiring diagrams for charging circuits, signal systems, and electronic ignition components with color-coded lead identification and resistance specifications. Torque specifications are documented throughout for engine assembly, transmission case fastening, frame mounting, and brake system components to ensure proper clamp load consistency.

The manual documents periodic maintenance requirements at 1,000-kilometer intervals for fuel filtration, carburetor adjustment, and spark plug inspection, progressing through 4,000-kilometer service points for oil changes and air cleaner maintenance, with comprehensive 8,000 and 12,000-kilometer checkpoints addressing brake pad wear, suspension fluid levels, and electrical system reliability. Front and rear suspension system assembly procedures include shock absorber structure overview, compression and recovery stroke operation, and oil capacity specifications for dampening performance. Disc brake system principles explain hydraulic pressure transmission through master cylinders and calipers, with detailed disassembly sequences for component inspection and air purging procedures.

FAQ

Identify the **correct** torque specification for cylinder head cover bolts? keyboard_arrow_down

10-12 N·m is required for cylinder head cover fixing bolts during assembly according to page 22 specifications.

What procedures are **documented** for valve clearance inspection? keyboard_arrow_down

0.03~0.05mm inlet valve clearance and 0.05~0.06mm exhaust valve clearance must be verified when engine is in cooling state before reassembly.

Determine the **precise** tool requirement for flywheel disassembly? keyboard_arrow_down

T03 screwed rod for flywheel disassembly is the mandatory tool listed in the special tools table on page 11.

What specifications define **proper** spark plug clearance values? keyboard_arrow_down

0.6~0.7mm is the standard gap measurement for C7HSA (NGK) spark plugs specified on page 70 of the electrical parameters section.

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Reviews (2)

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New
This manual is a must-have for anyone with an ARN125/150. The detailed instructions are clear and easy to follow. I was able to perform maintenance with confidence! The download process was smooth, and I received my link quickly. Highly recommend!
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New
Rated 4 out of 5 stars