1970-1973 Ski-Doo Snowmobiles Technical Data Manual, Page 9Get this manual
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1971 MODEL 24
CHASSIS
430 1242 sqin0.346 18" 2234 Manual 75W M-310-T-31 .018"-.022" .014"-.018" gals6.25 gals20: Drum Standard Standard
POWER TRAIN IGNITION