2000–2005 Yamaha Kodiak 400 YFM400FW ATV Service & Repair Manual with Supplement (P/N LIT-11616-08-73, LIT-11616-10-01)

Covers the 2000–2005 Yamaha Kodiak 400 YFM400FW ATV. The file contains the YFM400FWE (4GB series) Service Manual, P/N LIT-11616-08-73, and YFM400FWH Supplementary Service Manual, P/N LIT-11616-10-01. The outer cover carries reference LIT-11616-KD-40.

• Engine repair: Removal, internal inspection, valve-seat refacing, piston and crankshaft checks, cam timing, and reassembly of the air-cooled SOHC engine.

• Clutch and transmission: Primary and secondary clutch inspection, shift-fork and gear checks, middle drive axle service, and assembly adjustments.

• Carburetor service: Mikuni BTM32SH removal, disassembly, jet and coasting-enricher inspection, reassembly, and float-height and fuel-level adjustment.

• Shaft-drive repairs: Differential and constant velocity joint service, transfer gear overhaul, rear drive shaft inspection, and final-drive shim selection.

• Brakes and chassis: Hydraulic front drum brake repair and bleeding, rear brake service, wheel-bearing replacement, steering adjustment, and suspension inspection.

• Electrical diagnosis: Ignition, starting, charging, lighting, indicator, and cooling-fan troubleshooting, with wiring diagrams and component test charts.

Written for Yamaha dealers and qualified mechanics, this manual assumes an understanding of mechanical repair concepts and procedures.

Engine, Carburetor, and Clutch Work

Maintenance schedules and inspection procedures cover valve clearances, throttle cable adjustment, fluid changes, and chassis-pivot lubrication. The overhaul chapter adds cylinder-head, piston, crankshaft, and crankcase inspection, with component torque tables and wear limits.

Exploded engine assembly drawings cover the balancer drive gear, oil pump, CDI rotor, and recoil starter. Lubrication diagrams trace the engine oil circuit, while clutch illustrations identify plate types and assembly alignment marks.

Carburetor checks extend to piston-valve movement and the starter plunger, with replacement criteria for the needle valve and seat.

Differential, Transfer Gear, and Rear Final Drive

Gear-lash measurement drawings and shim-selection calculations accompany the bearing, seal, and gear replacement procedures. The final-drive procedures identify the YM-04050 / 90890-04050 bearing retainer wrench for the retainer with a left-hand thread.

The shaft-drive troubleshooting chart helps narrow complaints to bearing damage, gear mesh, or a damaged shaft before more detailed inspection.

The factory-assembled internal differential unit is not intended for disassembly. Its service section covers surrounding components and replacement of the unit. The front-drive pinion instructions also flag collapsible-collar damage from excessive tightening during setup.

Drum Brakes, Steering, and Suspension

Brake coverage reaches the front master cylinder and wheel cylinders, plus rear shoe, camshaft, and linkage service. The hydraulic-brake section warns that cleaning solvents can swell and distort internal seals.

Steering procedures address steering knuckles and tie-rod ends, with chassis geometry and toe-in specifications. Suspension work covers front arms, front shock absorbers, and the rear shock absorber and Monocross swingarm, including bearing replacement and spring-preload adjustment. Damaged shock absorbers are replaced as assemblies.

For brake work and servicing a raised ATV, follow the complete factory procedures and their safety precautions.

Ignition, Starting Interlocks, and Fan Diagnosis

Ignition and starting circuit diagrams show test connections for coils, relays, and interlock switches. Charging tests cover the stator and rectifier/regulator; starter-motor service includes brush, commutator, and armature inspection.

The cooling-fan tests distinguish the motor, relay, control unit, and thermo unit. Main-fuse and fan-circuit-breaker ratings are documented, along with tests for the neutral, reverse, and oil-temperature indicator circuits.

YFM400FWH Supplement and Regional Differences

The supplement distinguishes 4SH1 (USA), 4SH2 (Canada), 4SH3 (Europe), and 4SH4 (Oceania). Revised clutch and carburetor specifications appear alongside electrical data and cable-routing diagrams.

Battery instructions separate sealed MF units from the conventional battery used for Oceania, with different condition checks and charging charts. The included full wiring diagram belongs to the base manual; the supplement's separate wiring diagram is not included.

Selected Differential Fill and Ignition Test Values

These examples are a small sample of the manual's fluid-capacity and electrical test data.

The YFM400FWE differential oil table distinguishes a 0.47 L periodic oil change from a 0.5 L total fill.

Pickup-coil resistance between the red and white leads is 171–209 Ω for YFM400FWE and 459–561 Ω in the YFM400FWH supplement, both at 20°C (68°F).

Bookmarked PDF and Included Manual Sections

Navigation and wiring detail: Embedded bookmarks link to the base manual and supplement; chapter symbols provide additional orientation. PDF text search is unavailable. Small wiring labels require zooming; gray shading makes portions of the system-specific circuit diagrams harder to read.

The download is one printable, 417-page PDF in English: 381 pages for the base manual, 35 pages for the supplement, and one additional outer cover page. All covers and introductory pages are included in those counts.