For the 2006 RHINO 660 Yamaha issued LIT-11616-RH-67, a book written for that model year and no other. The machine's factory code is YXR66FAEXGV.
Single-year coverage gives the text an unusual clarity. Clearances, torque values and electrical readings apply to the YXR66FAEXGV as written, with no year qualifications to follow. That is worth something on a 660 whose specifications did not all carry over to the following year.
The manual covers maintenance intervals and procedures, engine service with inspection limits, transmission, drive shafts and differentials, steering, suspension and brakes, torque specifications placed with their assemblies, a full electrical chapter with wiring diagrams, and symptom-led troubleshooting.
Confirm YXR66FAEXGV on your machine, and note LIT-11616-RH-67 as the literature number — that code distinguishes this book from the 2007 volume, which is a different publication.
