Yamaha YZF-R7, Owner'S Service Manual

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CHK
ADJ
ADJUSTING THE VALVE CLEARANCE
6. Remove:
• timing chain tensioner
• timing chain guide (exhaust side)
• intake camshaft caps
• exhaust camshaft caps
• timing chain
(from the camshaft sprockets)
• intake camshaft
• exhaust camshaft
NOTE:
• Refer to “CAMSHAFTS” in chapter 4.
• When removing the timing chain and
camshafts, fasten the timing chain
with a wire to retrieve it if it falls into
the crankcase.
7. Adjust:
• valve clearance
▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼
a. Remove the valve lifter 1 and the
valve pad 2 .
NOTE:
• Cover the timing chain opening with a
rag to prevent the valve pad from fall-
ing into the crankcase.
• Make a note of the position of each
valve lifter 1 and valve pad 2 so that
they can be installed in the correct
place.
b. Select the proper valve pad from the
following table.
NOTE:
• The thickness
a
of each valve pad is
marked in hundredths of millimeters
on the side that touches the valve
lifter.
• Since valve pads of various sizes are
originally installed, the valve pad num-
ber must be rounded in order to reach
the closest equivalent to the original.
Valve pad thick-
ness range
Available valve
pads
Nos.
120 ~
240
1.20 ~
2.40 mm
25 thicknesses in
0.05 mm incre-
ments