1972-1981 Polaris Snowmobiles Master Repair Manual, Page 294Get this manual
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ENGINES Engine Specifications
19.5 26.5 11.0 11.3 20.0 19.5 15.5 22.9 21.5 19.7
Standard
250 250 336 335 336 439 432 500
53.5 53.5 62 62 60 67.75 67.75 62<