For a 2015 SRX 120, coded SRX120FL, Yamaha's shop manual is LIT-12618-03-04. The same book covers the model from 2013 to 2016.
Most work on these sleds is preventive, and that is where the manual is used most: the maintenance schedule, the inspection limits, and the torque figures for the fasteners that matter. When something does need to come apart, the engine, clutch, track, suspension and brake sections each carry the full procedure with the specifications alongside.
The electrical chapter includes a complete wiring diagram, which is the quickest route to a no-start that turns out to be a switch or a connector rather than the engine.
Check that SRX120FL matches the code on your machine before ordering, then read the tables by that code.
