2012 Yamaha YZ450F(B) / YZ450F Service Manual

Technical reference for YZ450F(B) and YZ450F models. Covers diagnostics, engine, chassis, fuel, and electrical systems. PN 33D-28199-82-E0.

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Document Details

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Document Number / Seller:
30325 / Patricia Cooper
File Size:
11.20 MB
File Type:
PDF
Language:
English
Pages:
223
Printable:
Yes
Category:
Motorcycle
Last updated / verified
Dec 24, 2025

Models Covered & Key Technical Specifications

Yamaha YZ450F(B) YZ450F Owner's Service Manual (2012) Overhaul-Reference

For YZ450F(B) / YZ450F models. Procedural Technical Handbook | Series Module.

  • Prescribed Thermal Rating: 121.4 mm establishes the core radiator capacity Architecture.
  • Documented Feed Speed: For efficient cooling, 310 mm defines the front wheel travel Norms.
  • Maximum Footprint Data: 2,195 mm -- signifies the overall length Topology.
  • System Securement Values: The front fork requires 21 Nm for tightening the pinch bolts Topology.
  • Technical Clearance Data: The throttle grip free play is specified as 3–5 mm Parameters.
  • Advanced Climate Parameters: Maximum tire pressure reaches 100 kPa Bounds.

Professional Workshop Service Manual & Technical Specifications

Yamaha YZ450F(B) YZ450F Owner's Service Manual (2012) Overhaul-Reference

Coverage-Scope: USA, CDN, EUROPE, AUS, NZ, ZA // Repair-Classification: Motorcycle / FI System Logic // Year-Coverage: 2012.

Assessment-Parameter Baseline Framework
Overall Length 2,195 mm 2,191 mm
Overall Width 825 mm 1,311 mm
Seat Height 999 mm 998 mm
Wheelbase 1,492 mm 1,487 mm
Minimum Ground Clearance 384 mm 383 mm
Curb Weight 111 kg 111 kg

Engineering chapters address the following systems: Engine, Chassis, Fuel System, Electrical, and Tuning. Rigorous procedures are detailed within each section, providing a comprehensive understanding of the machine's layout. An introduction to the manual's format and how to read its descriptions is included.

This document details the comprehensive systems and procedures of the Yamaha YZ450F(B) and YZ450F models. It covers engine specifications, regular inspection and adjustments, and component-specific details for the engine, chassis, fuel system, and electrical systems. The manual documents torque specifications for critical engine components to ensure proper seal compression uniformity.

Engine Systems Overview

This section outlines the engine's various systems, including the cylinder head, cylinder, camshafts, crankshaft, and balancer. It details inspection and measurement procedures for each component, emphasizing proper maintenance for optimal performance. Understanding these engine systems is crucial for any repair or overhaul process.

Chassis and Suspension Maintenance

The chassis section covers the front and rear suspension, wheels, brakes, and steering. It provides detailed instructions for disassembly, inspection, and reassembly of these critical components. Proper maintenance of the chassis and suspension ensures rider safety and optimal handling characteristics.

Electrical System and Fuel Injection

This part of the manual focuses on the motorcycle's electrical components and wiring diagram, including the ignition system, AC magneto, and ECU. It provides troubleshooting steps for the fuel injection system, addressing common issues like throttle position sensor errors and intake air pressure sensor malfunctions. Diagnosis and repair procedures are clearly laid out to assist in resolving electrical and fuel system problems.

FAQ

What **values** are important for the system architecture? keyboard_arrow_down

5 Nm torque is required for the protector bolt in the front fork assembly.

Assess the **applicable** tool requirements for steering adjustments. keyboard_arrow_down

YU-33975/90890-01403 is the required steering nut wrench for proper adjustment.

What **components** have exact electrical values for testing? keyboard_arrow_down

248–372 Ω is the specified resistance for the crankshaft position sensor at 20°C (68°F).

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Rated 5 out of 5 stars
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Absolutely love this manual! The diagrams are clear, and I got my download link within minutes. Highly recommend!
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The download process was seamless, and the manual is incredibly detailed. Perfect for all maintenance needs!