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11. Remove the cam chain tensioner pivot bolt; then
remove the chain tensioner.
YT114A
12. Using a needle-nose pliers, remove the circlip
securing the piston pin in the piston; then remove
the piston pin and piston. Take care not to drop the
circlip into the crankcase.
YT115
NOTE: Support the connecting rod with rubber
bands or install a connecting rod holder to avoid
damaging the rod.
NOTE: If the existing rings will not be replaced
with new rings, note the location of each ring for
proper installation. When replacing with new rings,
replace as a complete set only. If the piston rings
must be removed, remove them in this sequence.
Servicing Top-Side
Components
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
VALVE ASSEMBLY
When servicing valve assembly, inspect valve seats,
valve stems, valve faces, and valve stem ends for pits,
burn marks, or other signs of abnormal wear.
NOTE: Whenever a valve is out of tolerance, it
must be replaced.
Cleaning/Inspecting Cylinder Head
Assembly
Inspect the combustion area of the cylinder head for
cracks, burned valves or carbon build-up.
NOTE: If valves are discolored, they must be
replaced. Arctic Cat recommends taking heads to
a qualified machine shop for valve replacement or
valve seat grinding.
REMOVING VALVES
NOTE: Keep all valves and valve components as
a set. Note the original location of each valve set
for use during installation. Return each valve set
to its original location during installation.
1. Using a valve spring compressor, compress the
valve springs and remove the valve cotters.
Account for an upper spring retainer.
CC391D
2. Remove the valve seal and the lower remaining
spring seat. Discard the valve seal.
AT THIS POINT
To service cylinder, see Servicing Top-Side Compo-
nents sub-section.
CAUTION
When removing the cylinder, be sure to support the
piston to prevent damage to the crankcase and piston.
CAUTION
Do not allow the connecting rod to go down inside the
crankcase. If the rod is down inside the crankcase and
the crankshaft is rotated, severe damage will result.
AT THIS POINT
To service piston, see Servicing Top-Side Compo-
nents sub-section.
AT THIS POINT
To service center crankcase components only, pro-
ceed to Removing Left-Side Components.
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