GP800AZ is the code Yamaha stamped on the 2001 GP800R, and LIT-18616-02-26 is the service manual written for it. The same publication runs through the 2005 model year, so the whole GP800R production span is documented in one place.
What you get
- Engine disassembly, measurement and reassembly procedures
- Carburetion and fuel system service
- Jet pump, impeller and bearing housing work
- Electrical testing with factory values, plus wiring diagrams
- Periodic maintenance and adjustment tables
Where a year differs from the rest of the run, the text says so, which is the reason to check GP800AZ against your hull plate rather than working from the model name alone. The manual assumes you have basic tools and reads like instructions, not description.
Keeping the code with your service records saves repeating that check each time a fitment question comes up.
