2006 Arctic Cat DVX 400 Service Manual, Page 74Get this manual
12Apply moybdenum oil solution to the camshaft journals, camshaft lobes, and the camshaft journal holders; then place each camshaft into the correct position
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16Install the alignment pins (1) and cam chain guide; then install the camshaft journal holder marked EX on the exhaust camshaft and the camshaft journal holder marked IN on the intake camshaft