Welcome to the comprehensive service manual for the ATV Trail Boss 250 R ES, covering production years from 1985 through 1995. This All-Terrain Vehicle, a foundational model in the off-road lineup, is recognized for its ruggedness and versatility, making it suitable for both recreational trail riding and utility tasks. Engineered with a 2-stroke, air-cooled 244 cc engine and featuring an automatic transmission with electric start and recoil backup, the Trail Boss 250 R ES offered a robust platform for its era, competing with other notable ATVs of the period. Its design emphasizes practicality and durability, reflecting a long-standing heritage in powersports manufacturing. This workshop repair service manual provides detailed, professional-quality information essential for the maintenance and repair of your Trail Boss 250 R ES. It covers all aspects of the vehicle, including general information, fuel and cooling systems, engine components, drivetrain, suspension, steering, frame, and the complete electrical system. Within its hundreds of pages, you will find step-by-step repair procedures, disassembly and assembly instructions, diagnostic guides, and critical specifications, all supported by numerous diagrams and illustrations. The manual is designed to empower owners, mechanics, and technicians with the knowledge needed to keep this ATV in optimal working condition.