2000–2001 Yamaha WR400FM Owner's Service Manual

• Covers 2000–2001 Yamaha WR400F and WR400FM models, including global variants (USA, Europe, Canada, Australia, New Zealand, South Africa) and technical setups for the 399 cc DOHC 4-stroke engine
• Official Yamaha Owner's Service Manual detailing the WR Series units
• Contains 47 exploded-view diagrams, 14 wiring routing diagrams, 27 detailed lubrication schematics, and 5 exhaustive maintenance-torque specification tables
• Details primary technical benchmarks for the WR400F/M launch builds, featuring distinct tuning and maintenance specs for diverse international fuel and climate requirements
• Explores comprehensive tear-down processes for the Keihin FCR-MX39 carburetor, water pump, Trochoid oil pump, balancer shafts, and kick axle
• Outlines precise maintenance steps for the constant-mesh 5-speed transmission, telescopic front forks, map-controlled CDI unit, brake calipers, and Monocross suspension

Manual Contents

This OEM PDF manual lays out an extensive framework for machine maintenance and complete overhauls across 292 pages. It starts with general identification, VIN, and engine serial numbers for the 5GS5, 5GS6, and 5GS8 model codes. From there, it breaks down setup, break-in protocols, and regular inspection intervals. You get specialized adjustment procedures for engine oil, coolant, and chassis components like the swingarm and steering head.

By providing direct access to factory baseline suspension settings, comprehensive troubleshooting flow charts, and a unique 3-D Image Map of Ignition Timing, this guide prevents time-consuming trial-and-error testing. This allows mechanics to fix the motorcycle efficiently and lock in exact tolerances on the first attempt. It also provides step-by-step instructions to tackle complex jobs that typically generate high labor bills at the dealership. You can independently perform complete valve clearance adjustments using the factory pad selection table, execute front fork oil seal replacements, and handle brake system air bleeding.

The guide follows up with a complete technical breakdown of the engine, chassis, and electrical architecture. Electrical diagnostic chapters map out the ignition system, CDI unit, and throttle position sensor (TPS) wiring. To support your repair work, the document features accurate Wiring diagrams, a detailed cable routing diagram, and an exact lubrication chart. A dedicated tuning section covers performance-oriented instructions for engine and chassis adjustments. Always verify these factory torque values and follow proper shop safety protocols before beginning any heavy engine work or suspension disassembly.

Specification Highlights

Engine maintenance data includes precise cam dimensions and valve clearances. Cold settings call for 0.15–0.20 mm on the intake and 0.25–0.30 mm for the exhaust. When servicing these specific 4-stroke units, technicians must watch out for a notorious starting pitfall. Because the carburetor features a built-in mechanical accelerator pump, twisting the throttle grip while kickstarting will flood the intake, severely foul the spark plug, and often trigger a dangerous kickback. Furthermore, mistakenly engaging the manual decompression lever while the 399 cc engine is running can cause severe valvetrain damage.

Torque values for primary engine fasteners are clearly listed to ensure accurate reassembly. For example, the oil gallery bolt requires 18 Nm, while the primary drive gear needs 75 Nm. Coolant system capacity sits at 1.2 liters. Standard front fork oil levels range from 125 to 135 mm, depending on your regional market specifications. This provides all the necessary documentation for the 5GS series build without leaving out critical suspension or electrical parameters.