This manual covers the YTZ 250 TRI-Z, a versatile all-terrain vehicle produced from 1985 to 1986. Engineered for performance and reliability, the TRI-Z features a robust 2-stroke, liquid-cooled engine, a 6-speed manual transmission with a wet, multi-disc clutch, and a durable steel perimeter double cradle frame. Its advanced suspension system, with telescopic forks in the front and a Monocross system in the rear, ensures excellent handling and control across various terrains. The vehicle is equipped with dual disc brakes at the front and a single disc brake at the rear for confident stopping power. This comprehensive Service Repair Workshop Manual provides detailed information essential for maintaining and repairing your YTZ 250 TRI-Z. It covers a wide range of topics including engine, transmission, chassis, suspension, brakes, electrical systems, fuel system, and lubrication. With step-by-step instructions, technical specifications, and troubleshooting guidance, this manual is an indispensable resource for owners and technicians alike, ensuring the longevity and optimal performance of the vehicle.