The GP1800R line runs on LIT-18616-04-04, a service manual Yamaha maintained across model years 2021 through 2026. This 2025 craft appears in it under code GP1800A-BA, together with the GP1800R HO, the GP1800R HO with audio and the GP1800R SVHO with audio.
Six model years in one volume tells you the platform held steady; where it did change, the manual identifies which year and model a given figure belongs to.
What it documents
Supercharged engine service with torque specifications and wear limits, jet pump and driveline overhaul, fuel delivery, cooling, steering, hull and hood hardware, and the complete electrical schematics. Troubleshooting is organised by symptom and works through the checks in the order a technician would.
Confirm GP1800A-BA on your identification plate before ordering, as several similar codes share this book.
