This manual provides comprehensive service information for the 2004 ATV lineup, including the 250, 300, 400, 400 TBX, 500, 500 TBX, and 500 TRV models. ATVs are recognized for their robust engineering and utility, offering reliable performance for recreational trail riding and demanding work applications. The 2004 models, in particular, represent a mature and capable platform, with popular variants like the 400 and 500 series known for their strong performance and practical features, including advanced suspension systems on specific models. This original factory service manual is designed to be an indispensable resource for owners, independent repair shops, and technicians. It covers all essential aspects of maintenance, troubleshooting, and repair for these 2004 ATVs. Within its 550 pages, you will find detailed procedures for engine overhaul, drivetrain systems (manual and automatic transmissions), chassis components, and electrical systems. The manual also includes essential technical specifications, torque values, fluid recommendations, and diagnostic charts to ensure accurate servicing and optimal performance of your ATV.