1972-1981 Polaris Snowmobiles Master Repair Manual, Page 358Get this manual

1972-1981 Polaris Snowmobiles Master Repair Manual, Page 358

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ENGINES
HONING TO OVERSIZE
If the plston-cvlinder clearance measures greater than that in the chart for standard bore, it will be necessary to oversize the cylinder to .020 using new .020