2008 Arctic Cat DVX 90 / 90 Utility ATV Service Manual, Page 32Get this manual
16Remove the chain from the camshaft sprocket; then remove the rocker arm assembly and camshaftAccount for two alignment pins underneath the rocker arm assembly DSC02078
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17Remove two cap screws securing the left side of the cylinder head and remove the cylinder head assemblyDiscard the head gasket
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19Using needle-nose pliers, remove the piston pin circlips; then remove the piston pinAccount for the circlips