1981 Ski-Doo Shop Manual Supplement, Page 82Get this manual
1_ 1 SECTION 04 SUB-SECTION 02 (ELECTRICAL TESTS)
NIPPONDENSO ELECTRONIC IGNITION ENGINE
1981 engines equipped with Nippondenso are:
354Blizzard 7500Super Sonic 454Blizzard 9500Ultra Sonic 464Everest LCFutura LC 464Elite