2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 177Get this manual
27Place the valve cover into positionNOTE: At this point, the rocker arms and adjuster screws must not have pressure on them 28Install the four top side cap screws with rubber washers; then install the remaining cap screwsTighten only until snug
29In crisscross pattern starting from the center and working outward, tighten the cap screws securely30Adjust valvetappet clearance (see Section 2)CD471
25Loosen the four adjuster screw jam nuts; then loosen the four adjuster screws on the rocker arms in the valve cover