1970-1973 Ski-Doo Snowmobiles Technical Data Manual, Page 3Get this manual
1970 MODEL
1970 NORDIC SPECIFICATIONS
ITEM ENGINE
NORDIC Noof cylinders Bore Stroke Displacement Compression Ratio Overall length Overall Width Height WO Windshield Weight (lbs Bearing Area Ground Pressure (P.S.I Track (Width) Standard Gear Ratio Starting lighting Coil (Watts) Spark Plug(s) Bosch Spark Plug (Gap) Breaker Points (Gap) Tank Capacity-ImpTank CapacityU.SMixing Ratio (GasOil) Type Speedometer Tachometer
399 TWO 2x64.5 M.M2x61 M.M398.6 C.c8.75: 1
399E TWO
2x64.5 M.M2x61 M.M398_6 C.c8.75: 1