1985–1988 Yamaha Tri-Z 250 (YTZ250) OEM Service & Repair Manual

1985-1988 Yamaha Tri-Z 250 (YTZ250) OEM Service & Repair Manual

The 1985-1988 Yamaha Tri-Z 250 (YTZ250) OEM Service & Repair Manual is the official factory-issued guide for maintaining, troubleshooting, and repairing Yamaha’s high-performance 3-wheeler ATV. Tailored for experienced mechanics and hands-on enthusiasts, this manual delivers detailed service procedures and manufacturer-approved specifications essential for proper upkeep and performance.

Covering the full production span of the Tri-Z 250, this manual is structured to walk users through mechanical and electrical service tasks with precision and clarity. It includes exploded views, adjustment procedures, and factory torque specs to help with both minor maintenance and complex overhauls.

Content Overview:

• General Information – Vehicle specifications, torque settings, fuel/lube types, and model identification.
• Regular Maintenance & Adjustment – Inspection schedules, service intervals, cable routing, and routine procedures.
• Engine Maintenance & Repair – Cylinder head, piston, crankshaft, transmission, clutch, and cooling system.
• Chassis Maintenance & Repair – Front and rear suspension, brakes, steering, and wheels.
• Electrical Troubleshooting – Starter, ignition system, charging, lighting, and switches.
• Wiring Diagram – Full schematic for electrical diagnostics.
• Appendices – Supplemental data, technical updates, and service bulletins.

Whether you’re restoring a vintage Tri-Z 250 or keeping one in competition shape, this OEM manual provides the critical information needed to do the job right. A must-have tool for serious ATV technicians and Yamaha collectors alike.

Printable: Yes
Language: English
Compatibility: Pretty much any electronic device, incl. PC & Mac computers, Android and Apple smartphones & tablet, etc.
Requirements: Adobe Reader (free)