This document provides comprehensive technical information for the 2000 Xplorer 400, an all-terrain vehicle (ATV) renowned for its capable off-road performance and utility-focused design. Built by a leader in the powersports industry, the Xplorer 400 features a robust 398cc liquid-cooled, 2-stroke engine, a selectable 2WD/4WD Variable Transmission (PVT) with high and low range, and a sturdy chassis designed for challenging terrain. Its engineering prioritizes reliability and a strong utility-focused design, positioning it as a competitive option in the early 2000s ATV market alongside models from major manufacturers. This workshop service repair manual is designed to be an exhaustive resource for owners, mechanics, and technicians. It covers all essential aspects of the 2000 Xplorer 400, including detailed procedures for scheduled maintenance, engine overhauls, transmission repairs, chassis servicing, and electrical system diagnostics. The manual offers guidance on troubleshooting common issues, provides critical technical specifications, and outlines safety precautions. With its comprehensive coverage from basic adjustments to complete rebuilds, this English-language manual aims to facilitate the proper maintenance and repair of all 2000 Xplorer 400 models.