2005 Arctic Cat Snowmobiles Factory Service Manual, Page 16Get this manual
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Piston Replacement Guide ENGINE SIZE
370440 cc 2-6 550 cc 2-8 570 cc 2-10 600 cc (STD) 2-12 900 cc 2-14 500 cc "Laydown" Engine Model (wAPV) 2-16 500 cc "Laydown" Engine Model (wo APV) 2-18 6007