Model code RX10LTGTAX is the 2008 Apex, and the service information for it lives in LIT-12618-RX-02, the same volume Yamaha kept in print for the 2007 to 2010 machines and for the Apex RTX with reverse and the Attak GT.
A twenty-year-old sled asks more of a manual than a new one does. Parts have been swapped, harnesses repaired, suspensions adjusted by previous owners, and the only way back to a known state is the factory specification. This book supplies those: clearances, service limits, adjustment ranges and torque values, with the year noted where a figure changed.
The power train and suspension chapters are particularly worth having, and the wiring diagrams let you compare what is on the sled against what left the factory.
