2011 Arctic Cat 150 ATV Service Manual, Page 27Get this manual
9Install the two alignment pins; then install the camshaft holder and secure with the four cylinder head nuts and washerUsing crisscross pattern, tighten to 14 ft-lbNOTE: Threads must be clean with fresh engine oil applied to ensure correct torque
11Install the cam chain tensioner cover bolt and tighten to 36 inlb12Check that the cam gear alignment marks are correctly oriented; then install and tighten the internal cylinder head to cylinder cap screws to ft-lb13Install the cylinder head cover with new O-ring and tighten securely
Left-Side Components
NOTE: For efficiency, it is preferable to remove and disassemble only those components which need to be addressed and to service only those componentsThe technician should use discretion and sound judgment