2002–2007 Suzuki Eiger 400, LT-F400/400F Factory Service Manual (P/N 99500-43054-01E)

• Covers 2002–2007 Suzuki LT-F400 and LT-F400F Eiger 400 models, including both 2WD and 4WD configurations
• Official Suzuki publication (P/N 99500-43054-01E)
• 420 pages featuring exploded-view diagrams, electrical schematics, and fluid service capacities
• Factory-authorized reference for maintaining and overhauling the 376 cc air-cooled engine and associated driveline components
• Essential ATV repair PDF providing step-by-step mechanical troubleshooting
• Details the KEIHIN CVK32SS carburetor, centrifugal automatic clutch, transfer gearshift, and recoil starter

Factory Maintenance and Component Servicing

This service publication provides the exact documentation dealership technicians rely on for the Eiger 400 platform. It covers everything from engine top-end rebuilds to bottom-end teardowns and transmission disassembly. Rather than scheduling an expensive workshop visit, DIYers can follow step-by-step procedures for complex tasks such as exact carburetor tuning, centrifugal automatic clutch lock-up inspections, compression pressure testing, and brake fluid circuit air bleeding. You will find clear parameters for chassis component inspections and electrical system diagnostics, supported by periodic maintenance charts, torque specification tables, wire routing views, and valve timing inspection drawings. Following standard service intervals for critical fluids, drive system lubrication, and valve clearance adjustments is essential for machine longevity. Always observe standard shop safety practices and use the correct hoist points when lifting the ATV to prevent equipment damage or personal injury. The documentation references the exact special tools required for complex technical operations. For daily workshop operations, having immediate access to these precise OEM testing parameters prevents diagnostic dead-ends and ensures every rebuilt component operates strictly within factory tolerances, significantly increasing bay turnaround efficiency.

Engine and Chassis Specifications

Precise torque values and clearances are detailed throughout the manual to ensure accurate reassembly. For example, the cylinder head bolts require 26 Nm of torque during engine assembly, while the final drive bevel gear nut needs a full 100 Nm. Intake valve clearances for the 376 cc engine are strictly set at 0.05–0.10 mm when cold. Fluid capacities are clearly charted: expect to use 3.2 liters of engine oil for a complete change with a filter, and 300 ml of differential gear oil. Beyond basic maintenance, the book includes extensive tables outlining internal wear limits, piston diameters, connecting rod deflection, and gear tooth clearances to help you accurately verify component viability during a deep rebuild. When overhauling these specific Suzuki models, experienced technicians must pay close attention to the centrifugal clutch shoe nut, which features left-hand threads; applying standard removal techniques can easily cause crankshaft damage. Furthermore, the oil pump case securing screw is permanently sealed with high-strength thread locker from the factory; attempting to force this fastener during a teardown frequently destroys the assembly, meaning the oil pump is generally treated as a single replacement unit.