2004 Yamaha TT-R90S Service and Repair Manual

Code TTR90S on the frame, LIT-11626-17-19 on the manual. That pairing identifies the correct factory service reference for a 2004 TT-R90S, and it is worth checking both before you order anything.

Yamaha wrote the book to cover the 2004 year and to include the TT-R90E as well, so the electric-start machine is documented in the same volume. Shared assemblies are described once; the differences are flagged where they occur.

The content follows dealer practice. Maintenance schedules and adjustment specifications open the book, engine work proceeds in the sequence the factory prescribes, and the chassis and electrical chapters close it out with wiring diagrams as drawn in Japan. Fastener torque is quoted alongside the step, not somewhere else.

It is written for someone with the bike in front of them and the side cover already off.