Yamaha XZ550RJ 1982 Service Manual page 18

1. Emblem plate
7. Align the "T" mark (for the front cylin-der)Vpn
the flywheel with the stationary pointer on
the crankcase cover. The pointer can be
viewed through the timing window in the
crankcase cover. When the "T" mark is
aligned with the stationary pointer, the piston
is at Top Dead Center (TDC). Valve clear-
ance should be checked and adjusted when
the piston is at TDC on the compression
stroke. The piston is at TDC on compression
when there is free play in both valve adjust-
ers.
NOTE:
The crankshaft should be turned counterclockwise,
as viewed from the left side of the motorcycle.
2. Timing plug
The flywheel is marked as follows:
8. Use a feeler gauge to determine the clear-
ance. If clearance is incorrect, record the
measured amount of clearance. This must
be measured carefully.
Intake valve (cold):
0.11 ~0.15mm (0.0043 -0.0059 in)
Exhaust valve (cold):
0.16 ~ 0.20mm (0.0063 ~ 0.0079 in)
9. Valve clearance is adjusted by replacing the
adjusting pad on the top of the valve lifter.
Adjusting pads are available in 25 thick-
nesses, ranging from No. 200 (2.00 mm
(0.079 in)) to No. 320 (3.20 mm (0.130 in) >
in steps of 0.05 mm (0.002 in). The thick-
ness of each pad is marked on the pad face
that contacts the valve lifter (not the cam).
Adjustment of the valve clearance is accom-
plished as follows:
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