Yamaha YZ 2016 Series Owner's Service Manual page 305

IGNITION SYSTEM
1. Joint connector
2. Joint connector
4. AC magneto
8. Battery
9. Frame ground
10.Starter relay
11.Main fuse
16.ECU (engine control unit)
17.Ignition coil
18.Spark plug
24.Joint connector
29.Lean angle sensor
30.Engine stop switch
36.Frame ground
37.Ignition coil sub-lead
8-3