1999 Yamaha YFM400FWAM / YFM400FWAMC ATV Service Manual

This Service Manual covers the Yamaha YFM400FWAM and YFM400FWAMC models from 1999. It provides essential repair, maintenance, and troubleshooting information with detailed diagrams and part numbers. Get yours today!

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Document Details

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Document Number / Seller:
26184 / Robert Robinson
File Size:
12.93 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
ATV
Last updated / verified
Oct 4, 2025

Models Covered & Key Technical Specifications

Yamaha YFM400FWAM / YFM400FWAMC (LIT-11616-13-21) -- 1999 Service Manual | ATV Packet.

  • Authorized Linear Velocity: 84.5 mm/s establishes the maximum piston speed, ensuring optimal engine performance.
  • Specific Form Factor: For critical component alignment, 10 Nm (7.2 ft-lb) defines the tightening torque for the oil filter.
  • Operational Storage Capacity: The electrical system requires 12 V to ensure consistent power delivery.
  • Fundamental Electrical Specs: A 30 A main fuse protects the electrical circuit from overloads, safeguarding components.
  • Specific Operational Speed: The engine idles at 1,450 ~ 1,550 r/min, contributing to smooth operation and fuel efficiency.
  • Core Linear Velocity: The maximum tire pressure for the rear is 22 kPa (3.2 psi), critical for safe handling.

Professional Workshop Service Manual & Technical Specifications

Integrated Factory Safety Manual: Yamaha YFM400FWAM / YFM400FWAMC Service Manual: 1999 Standards-Vault

Subsystem-Focus: 1999 Yamaha YFM400FWAM / YFM400FWAMC // Technical-Domain: ATV / Engine Logic // Subsystem-Focus: Service-Data.

TOP

Assessment-Parameter Technical-Path Calibration-Data
General Specifications Engine & Chassis Standard Metrics
Maintenance Intervals Periodic Checks Initial & Every
Component Diagrams Exploded Views Part Identification
Troubleshooting Guide Fault Diagnosis System Isolation
Electrical System Circuitry & Components Testing Procedures

OEM specifications cover a wide array of systems and procedures, ensuring your ATV remains in peak condition. Rigorously requiring proper maintenance, this manual guides you through each step with clear instructions and diagrams. Each system is carefully documented, from the engine and drivetrain to the chassis and electrical components.

Wear limits are specified for engine components to ensure proper function and longevity.

System operation descriptions cover the cooling, lubrication, and fuel systems for optimal performance.

The documentation addresses the electrical system, including ignition, starting, and charging circuits.

Assembly instructions are detailed for major components like the engine, transmission, and suspension systems.

Hydraulic schematics are included for the brake system, detailing fluid levels and bleeding procedures.

This manual documents torque specifications for critical fasteners to ensure proper gasket seal integrity.

FAQ

Assess the **critical** calibration settings for engine performance. keyboard_arrow_down

84.5 mm/s is the maximum piston speed, critical for optimal engine performance according to the specifications.

What components have **required** clearance measurements? keyboard_arrow_down

Valve clearance measurements are required for the engine, with specified values for intake (0.06-0.10 mm) and exhaust (0.10-0.20 mm).

Confirm the **specified** torque specifications for key fasteners. keyboard_arrow_down

10 Nm (7.2 ft-lb) is the specified torque for the oil filter, ensuring a proper seal and preventing leaks.

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Reviews (5)

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The manual is incredibly detailed and easy to follow. The diagrams really help with understanding the parts. Highly recommend it!
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This manual covers everything! The download was quick and easy, and I appreciated the prompt email assistance provided. Definitely worth the investment!
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The illustrations in this manual are top-notch! I had a question and the support team responded in no time. Very professional service!
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Rated 5 out of 5 stars
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I was impressed with the thoroughness of this service manual. Download process was smooth, and the email support was quick and helpful!