2006 Yamaha YZ85 / YZ85LW Owner's Service Manual (P/N 5PA-28199-84)

• Details the standard and LW (Large Wheel) configurations of the 2006 Yamaha YZ85 motocross competition machines
• Official OEM publication (P/N 5PA-28199-84), featuring complete factory service data and maintenance specifications
• Contains 506 pages of technical PDF documentation, including exact torque specs, wiring diagrams, and component clearance charts
• Serves as the definitive 2006 reference guide for all YZ85(V) and YZ85LW(V) launch builds
• Covers essential mechanical assemblies including the PWK28 carburetor, reed valve, water pump, CDI magneto, crankcase, shift cam, front fork, and swingarm
• Features vital visual aids such as exploded diagrams, cable routing diagrams, job instruction charts, sectional views, tuning charts, suspension setting charts, and inspection flowcharts

What's Inside the Manual

This document provides the core technical reference for the 2006 Yamaha YZ85 and YZ85LW. It breaks down maintenance, inspection, and assembly procedures for Yamaha's competition-grade two-stroke platform. The chapters detail general information, complete engine overhauls, chassis maintenance, electrical component specifications, and tuning adjustments. It also lists identification details, including market-specific serial numbers and codes. For track prep, you will find documented maintenance schedules and pre-operation inspections critical for closed-course, high-performance riding.

By utilizing the step-by-step procedures outlined in this guide, mechanics and DIYers can safely bypass expensive dealership labor rates. It includes precise instructions for complex shop tasks such as splitting the crankcase for a transmission repair, rebuilding the front fork with new oil seals, bleeding the brake system, and overhauling the top end. The distinct advantage of this specific manual is the ability to properly dial in the chassis and engine for exact track conditions, utilizing the extensive tuning data to eliminate trial-and-error assembly during your daily repair work.

Core Specifications and Reference Data

Expect hard data for all inspection and teardown tasks. The manual lists the cylinder head combustion chamber capacity at exactly 7.14 cm³. Secondary reduction ratios are laid out based on region: 47/14 for USA/ZA models and 48/14 for Europe/CDN/AUS/NZ. The liquid-cooling system requires a 0.54-liter capacity across all routing paths. For reassembly, all fastener torque values—including the 79 Nm primary drive gear spec—are categorized by thread size. Piston-to-cylinder clearance is set at a tight 0.040–0.045 mm for standard engine builds. Note that high-performance two-stroke maintenance carries inherent risks; always rely on the complete OEM documentation and ensure any mechanical work is performed by qualified technicians.