The 2024 UMAX 2 Rally AC is coded YUM2E24_UMXS and is documented in Yamaha LIT-19616-A3-12.
Eight 2024 UMAX configurations appear in that book. Rather than reprint the shared chassis work for each one, Yamaha wrote it once and identified the drive-system differences by code, so the AC-specific pages are marked as such.
Electrical service covers the motor, the controller and its fault diagnosis, battery pack maintenance and the charging system, all with test values to measure against. Chassis chapters run through brakes, steering, suspension, wheels, axle and body panels. Torque figures are tabulated and wiring diagrams are complete.
Read the code on the vehicle before you start: YUM2E24_UMXS. Paired with LIT-19616-A3-12 it is what a parts counter needs to confirm you are ordering the right components.
