2005 Yamaha Kodiak 400 - YFM400FAT ATV Service Manual Set (P/N 5TE-F8197-10)

For the 2005 Yamaha Kodiak 400 (YFM400FAT) 4x4 ATV, this service manual set combines the YFM400FA base manual, Manual No. 5TE-F8197-10, with the YFM400FAT supplementary procedures. The supplement provides the model-specific changes used alongside the base instructions.

• Engine repair: Engine removal, cylinder-head and valve service, piston inspection, crankcase separation, and crankshaft and oil-pump work.

• Belt drive and transmission: Primary and secondary sheave disassembly, centrifugal-clutch inspection, shift-cam and shift-fork checks, and transmission assembly.

• Shaft drive: Front and rear constant velocity joint service, differential and final-drive adjustment, pinion positioning, and shim selection.

• Brakes and chassis: Hydraulic brake bleeding, master-cylinder and caliper service, steering-stem inspection, ball-joint replacement, and rear-knuckle and stabilizer checks.

• Carburetion and cooling: Mikuni BSR33 carburetor disassembly, fuel-level adjustment, radiator-cap pressure testing, thermostat checks, and water-pump service.

• Electrical troubleshooting: Ignition, starter, charging, lighting, fan-motor, and 2WD/4WD fault isolation, supported by circuit diagrams and component test specifications.

This set suits technicians with engine-repair experience and access to the specified pullers, sheave tools, and electrical test equipment.

Base Manual and Supplement: Chassis Differences

The base manual describes a swingarm rear suspension and rear drum brake. The supplement supplies the double-wishbone rear suspension, rear CV joints, stabilizer, hydraulic rear disc brake, and park-switch information for the YFM400FAT. This distinction helps you select the matching brake, final-drive, and suspension procedures before disassembly.

Always ensure the ATV is securely supported on a level surface, and follow the manual's precautions for hot coolant and DOT 4 brake fluid.

Engine, Sheaves, and Internal Transmission

Inspection sections cover valve-seat contact, stem-to-guide clearance, piston-to-cylinder clearance, ring end gaps, crankshaft runout, and oil-pump clearances. Timing-mark illustrations support cylinder-head installation and balancer alignment.

The secondary-sheave procedures identify the spring compressor YM-04134 / 90890-04134 and fixed block YM-04135 / 90890-04135. Clutch checks distinguish one-way bearing operation from clutch-shoe wear, while the recoil-starter and A.C. magneto sections cover starter-clutch direction checks and rotor installation.

Final-Drive Adjustment and Repair Limits

The drive-train troubleshooting chart relates rumble, whine, and jerky operation to bearing, gear-lash, and gear-tooth faults. Gear setup includes pinion-shim calculations, ring-gear thrust-clearance checks, and final gear-lash adjustment.

The factory-assembled differential gear unit must remain intact; the manual covers its removal, inspection, adjustment, and replacement. The middle driven shaft and final-drive pinion bearing retainers use left-hand threads. Treating them as conventional threads risks damage to the retainers or housings.

Carburetor and Cooling-System Service

Carburetor inspection covers the needle valve and seat, vacuum diaphragm, coasting enricher, and float assembly. Cooling procedures distinguish thermostat opening tests from radiator-cap pressure tests and water-pump mechanical-seal replacement.

Circuit Testing and System Diagrams

Ignition and electric-starting circuit diagrams, the YFM400FAT wiring diagram, coolant-flow diagrams, oil-flow diagrams, and cable-routing drawings show connections and component relationships.

Electrical diagnostic charts specify test points, lead colors, and acceptable readings to help separate switch and wiring faults from component failures. The supplement adds park-indicator fault tracing.

A Preview of Carburetor and Gear-Adjustment Data

These examples are a small sample of the adjustment data in the set.

The Mikuni BSR33 float-height specification is 13 mm, measured from the float-chamber mating surface with the gasket removed and the carburetor inverted. The float arm rests on the needle valve without compressing it.

For the YFM400FAT, front differential gear lash is 0.10–0.50 mm; rear final gear lash is 0.1–0.2 mm. Both checks use four shaft positions; the rear gear case is positioned with its ring-gear bearing housing facing down.

Searchable Text, Bookmarks, and PDF Contents

Search, navigation, and wiring detail: The PDF has searchable text and embedded bookmarks for both manuals and their main sections. Small wiring labels, connector markings, and wire-color codes are readable when enlarged; the full wiring sheets require zooming for fine detail.

The set is supplied as one printable, 461-page PDF containing two manuals:

The total already includes two additional pages: one promotional cover and one guide to using the combined file.