1970-1973 Ski-Doo Snowmobiles Technical Data Manual, Page 70Get this manual
1972 DOUBLE CYLINDER ELECTRICAL START
Applicable on: Nordic 640ER
TACHOMETER
YLI RD YLRD
MAGNETO GENERATOR
SrP;:AR:PLUG
FUSE 10Amp) GR """
IGNITION COIL MAG BL
RD III IV
HEADLAMP