2001 Yamaha XQ125 / XQ150 Service Manual (P/N C4085-91017)

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Yamaha Models Covered & Key Technical Specifications

Models: Yamaha XQ125, Yamaha XQ150
Sub-models / Variants: 5HT1-AE2
Model Years: 2001
Technical Data:

  • Engine type: Liquid cooled 4-stroke, SOHC, single cylinder
  • Displacement: 124 cc (XQ125) / 152 cc (XQ150)
  • Compression pressure (standard): 1,400 kPa (14.00 kg/cm²)
  • Spark plug: CR8E (NGK)
  • Spark plug gap: 0.5–0.7 mm
  • Idle speed: 1,600–1,800 rpm
  • Cylinder head bolt torque: 22 Nm (2.2 m•kg)
  • Engine oil capacity: 1.2 L (periodic change), 1.4 L (total)
  • Coolant capacity: 1.25 L total
  • Fuel tank capacity: 7.5 L
  • Battery: 12V 8Ah (CB7L-B2 or YB7L-B2)
  • Transmission: V-belt automatic, centrifugal clutch
Technical Specifications
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Document Number / Seller:
24880 / Paul Peterson
File Size:
20.89 MB
File Type:
PDF
Language:
English
Pages:
278
Printable:
Yes
Category:
Scooter
Last updated / verified
Apr 20, 2025

Yamaha Manual Features & Content Preview

2001 Yamaha XQ125 and XQ150 Technical Documentation

  • Covers 2001 Yamaha XQ125 and XQ150 scooter variants (5HT1-AE2) with liquid-cooled single-cylinder engines
  • Original OEM publication P/N C4085-91017, 2nd edition published April 2001 by MBK Industrie
  • Contains 47 detailed exploded-view diagrams, 12 complete cable routing schematics, and extensive torque specification tables
  • This 2001 second edition serves as the definitive reference for all engine, chassis, and electrical system diagnostics for the XQ series

Technical Scope and Documentation

The 2001 Yamaha XQ125 and XQ150 service manual provides a structured look at maintenance and overhaul procedures for the 5HT1-AE2 variant. Chapters segment the content into general information, technical specifications, periodic checks, engine overhaul, cooling systems, fuel delivery, chassis adjustments, electrical diagnostics, and troubleshooting flow charts. The documentation focuses on clear reference values for mechanics performing routine service or major engine work.

Specification Highlights

This manual includes comprehensive data for engine and chassis maintenance. Cooling system capacity is documented at 1.25 liters, with thermostat opening temperatures specified at 82°C. The electrical system section outlines a 14V 170W charging output at 5,000 rpm. Valve clearance for the intake is listed at 0.10–0.14 mm in the cylinder head specification table. Cylinder head bolt torque is specified at 22 Nm (2.2 m•kg) in the engine assembly data. The fuel tank capacity for the 2001 Yamaha XQ125 is 7.5 liters. Reference what an OEM service publication covers to understand how the technical information is structured. Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions.

An official 278-page Yamaha OEM workshop manual covering the 2001 XQ125 and XQ150, documenting engine, chassis, electrical, and fuel-delivery specifications for the 5HT1-AE2 model series.

Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

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