This document provides comprehensive service and repair information for the ATV 400 6x6, covering the 1996 and 1997 model years. Engineered as a robust utility all-terrain vehicle, the ATV 400 6x6 is renowned for its selectable 6x6 all-wheel-drive capability, substantial cargo capacity, and reliable performance across various demanding applications, including work, farm tasks, trail riding, and general utility duties. Its design prioritizes durability and functionality, making it a capable machine for both recreational and professional use, often compared favorably to competitors of its era for its specific utility features. This workshop service repair manual offers factory-level detail on all major systems, including the engine, transmission, drivetrain, suspension, brakes, steering, electrical system, and fuel system. It provides detailed step-by-step instructions for maintenance, diagnostics, troubleshooting, repair, overhaul, and rebuilding of components. Essential technical data, torque specifications, fluid recommendations, and wiring diagrams are included to assist owners, mechanics, and technicians in maintaining the optimal performance, reliability, and safety of their ATV 400 6x6.