Yamaha XZ550RJ 1982 Service Manual page 19

a. There is a slot in each valve lifter. The slots
must be positioned opposite of each other on
the exhaust and intake side before the tappet
adjusting tool is installed.
b. Turn the crankshaft until the camshaft identi-
fication mark (IN or EX) faces upward. Place
the tappet adjusting tool under the camshaft
with the tool match mark (•) and camshaft
I.D. mark aligned.
c. Turn the crankshaft until the lobe of the tool
depresses the valve lifters.
WARNING:
When turning the crankshaft, exercise care so
that the tappet adjusting tool does not contact
the mating surface of the cylinder head and the
cylinder head cover.
NOTE:
When installing the tappet adjusting tool onto the
camshaft, be careful so that the lobe of the tool
does not ride on the pad.
d. Remove the pads from the lifters. There is a
slot in each lifter. Use an air gun or a small
screwdriver and a magnetic rod to remove
the pads. Note the numbers on the pads.
e. Proper pad selection is made as follows:
(Use appropriate chart for exhaust or intake
valves.)
1) Find number of original (installed) pad
number on chart. Read down on chart.
2) Find measured valve clearance (from
step 1) on chart. Read across.
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