2026 Yamaha GP1800R SVHO Service and Repair Manual
GP1800C-CA is the code on the 2026 GP1800R SVHO. Yamaha documents it in LIT-18616-04-04, which also covers the GP1800R HO, the HO with audio and the SVHO with audio, across model years 2021 to 2026.
Worth noting: the code changed between the 2025 and 2026 SVHO builds even though the manual did not. That is exactly why reading the plate matters more than reading the year on the hull.
The service content includes supercharged engine overhaul with torque and clearance data, jet pump and driveline work, fuel and cooling system procedures, steering, hull and hood hardware, and full wiring diagrams. Diagnostic sections start from the symptom and narrow down through ordered checks rather than by replacing parts until the problem goes away.
It is the same reference Yamaha supplied to its dealer network, unedited.