1986 Yamaha TRI-Z Service and Repair Manual

A fresh part number appears for the second season. LIT-11626-05-32 is the factory service manual for the 1986 Tri-Z, model code YTZ250S, and it does not share coverage with the 1985 book.

So the check is a real one: YTZ250S for 1986, a separate volume for the year before. Read the frame code before ordering, particularly if the machine has been apart at some point in its life.

What you get

• Periodic inspection and adjustment procedures
• Engine service with clearances, wear limits and torque sequences
• Carburetor and ignition specifications
• Electrical testing with factory readings
• Steering, suspension, wheel and brake repair
• Wiring diagram and troubleshooting guidance

This is original Yamaha service literature, not an interpretation of it. For a competition-oriented three-wheeler that has likely seen hard use, the factory limits are the reference that decides whether a part goes back in or gets replaced.