2020 Yamaha WOLVERINE X4 XT-R Service and Repair Manual
The XT-R and the standard X4 were handled in a single 2020 volume, LIT-11616-33-42. Look for model code YXF85WPSLZ, which is the XT-R, when a specification table splits the two apart.
Yamaha's approach to shared books is consistent: common procedures are written once, and code-specific values are called out where they diverge. So the first job with this manual is not turning a wrench, it is confirming the code on the machine matches the column you are reading.
From there the content is thorough. Maintenance schedules and inspection routines open the book, followed by engine, drivetrain, chassis, brake, steering and electrical chapters, each with removal and installation steps, wear limits and torque figures. Troubleshooting tables and the full wiring diagrams close it out.