2007 Arctic Cat ATVs factory service and repair manual, Page 215Get this manual
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9 Loosely install the five cylinder head nuts10 In crisscross pattern, tighten the four cylinder head cap screws (from step 8) to 3.8 kg-m (27.5 ft-lb) 500 models, 5.5 kg-m (40 ft-lb) 650then tighten