Arctic Cat 120 Sno Pro 2010 Service Manual page 130

5. Remove the cap screws securing the APV assem-
blies to the cylinders; then remove the APV
assemblies and set them aside.
NOTE: For installing purposes, note that the APV
exhaust valves and gaskets are directional.
NOTE: At this point on the 800 cc, remove the
spark plugs to gain access to the cylinder head
cap screws; then disconnect the knock sensor
plug-in.
6. Remove the cap screws securing the cylinder
head; then lift the front of the head and remove the
O-rings.
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7. Carefully lift and turn the cylinder head to gain
access to the hose clamp securing the coolant hose
to the cylinder head; then loosen the clamp.
Remove the coolant hose and breather hose con-
nected to the cylinder head.
NOTE: On the 1000 cc, remove the coolant
bypass hoses from the cylinders.
8. Remove the cap screws and nuts securing the cyl-
inders to the crankcase; then using a soft hammer,
gently tap the cylinders and remove from the
crankcase by lifting them straight up off their
studs. Account for gasket(s) and alignment pins.
CAUTION
When removing a cylinder, be sure to support the pis-
ton to prevent damage to the crankcase and piston.
NOTE: If servicing the MAG-side only, the PTO-
side cylinder must be removed.
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