2007 Arctic Cat Four-Stroke Factory Service Manual, Page 139Get this manual
! NOTE: Round off the last two digits to the nearest even whole numberShim Thickness (mm) 2.18 2.20 2.22 2.24 2.26 2.28 2.30 2.32 2.34 2.36 2.38 2.40 2.42 2.44 2.46 2.48 2.50 2.52 2.54 2.56 2.58 2.60 2.62 2.64 2.66 2.68 2.70 2.72 2.74 2.76 2.78 2.80 2.82 2.84 2.86 2.88 2.90 2.92 2.94 2.96 2.98 3.00
! NOTE: If the valve clearance is in between shim sizes, always adjust to the looser side of the specification
5After the new shim has been selected, install the shim into the bucket with the number side of the shim facing down and make certain that the shim is sitting flat in the bucket seatThen rotate the crankshaft counterclockwise 90 and remove the special toolInstall the camshaft bearing cap and cap screws and tighten to 1.1 kg-m (8 ft-lb)