2011 Arctic Cat Prowler XT/XTX/XTZ ATV/ROV Service Manual, Page 30Get this manual
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Problem: Engine lacks power Condition 1 Valve clearance incorrect 2 Valve springs weak 3 Valve timing out of adjustment 4 Piston ring(s)cylinder worn 5 Valve seating poor 6 Spark plug fouled 7 Rocker