Yamaha RST90L Owner's Manual page 86

Specified fuses:
9Main fuse:
0"HEAD" (Headlight) fuse:
A"SIG" (Signal) fuse:
B"DC TERM" (Auxiliary DC jack) fuse:
C"C/W" (Carburetor warmer) fuse:
D"IGN" (Ignition) fuse:
E Spare fuses (20 A, 10 A, 15 A, 3 A)
F Spare main fuse
8-32
30 A
20 A
10 A
3 A
20 A
15 A