2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 30Get this manual

2006 Arctic Cat Y-6/Y-12 50cc and 90cc Service Manual, Page 30

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16Remove the chain from the camshaft sprocket; then remove the rocker arm assembly and camshaftAccount for two alignment pins underneath the rocker arm assembly
18Remove the bottom chain guide; then remove the cylinderAccount for two dowel pins located between the crankcase and the cylinder