Working on a 2004 GP800R means working from LIT-18616-02-26, the factory manual Yamaha wrote for the 2001 to 2005 craft. The 2004 model carries code GP800A-C.
Main sections
- Specifications, including torque and service limits
- Periodic inspection and adjustment
- Fuel system and carburetion
- Power unit overhaul
- Jet pump and drive components
- Electrical system with wiring diagrams
- Hull and hood hardware
Nothing in it is written for a showroom. The value is in the numbers, the clearances, resistances and tightening figures, and in the order of operations, which is what keeps a reassembled pump or cylinder from failing early. Illustrations are the factory drawings, and the diagnosis pages start from the symptom rather than the part, so a running complaint gets narrowed before anything is bought. Check GP800A-C on the hull plate so you know the figures are yours.
