2000 Arctic Cat Snowmobiles Factory Service Manual, Page 150Get this manual
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ENGINE PISTON TRAVEL VERSUS CRANK ANGLE CHART
340 cc FC 440 cc Lightweight LC 63mm stroke 64.6mm stroke 65mm stroke
Inches BTDC 0.005 0.007 0.011 0.014 0.018 0.023 0.028 0.033 0.037