1978 Ski-Doo Shop Manual, Page 344Get this manual
SECTION 08 SUB-SECTION 01-05
1978 TRACK SPECIFICATIONS
CLEAT AND GUIDE ARRANGEMENT
TYPE 1: Narrow insert
TYPE 2: Narrow insert with shoulder
TYPE 3: Narrow guide with shoulder
TYPE 4: Wide guide (large traek hole)
TYPE 5: Wide guide (large traek hole)
TRACK NUMBER IELAN and SPIRIT iELAN IOLYMPIQUE IOLYMPIQUE INUVIK