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CC127D ATV-1068A
2. Wash the cylinder in parts-cleaning solvent.
Measuring Camshaft Runout
3. Inspect the cylinder for pitting, scoring, scuffing,
and corrosion. If marks are found, repair the sur- NOTE: If the camshaft is out of tolerance, it must
face using a ball hone. be replaced.
NOTE: To produce the proper 60° cross-hatch
1. Place the camshaft on a set of V blocks; then posi-
pattern, use a low RPM drill (600 RPM) at the rate tion the dial indicator contact point against the
of 30 strokes per minute. If honing oil is not avail-
able, use a lightweight petroleum-based oil. Thor-
shaft and zero the indicator. 3
oughly clean cylinder after honing using soap and
hot water. Dry with compressed air; then immedi-
ately apply oil to the cylinder bore. If the bore is
severely damaged or gouged, replace the cylinder.
CC283D
2. Rotate the camshaft and note runout; maximum
tolerance must not exceed specifications.
Measuring Camshaft Lobe Height
CC390D
4. If any measurement exceeds the limit, bore the 1. Using a calipers, measure each cam lobe height.
cylinder and install an oversized piston or replace
the cylinder.
NOTE: Oversized piston and rings are available.
The oversized piston and rings are marked for
identification.
ATV1013A
2. The lobe heights must not exceed minimum speci-
fications.
3-19