Yamaha VMX12 2001 Service Manual page 149

CAMSHAFTS
1. Install:
• exhaust camshaft
• intake camshaft
a. From the "T1" marks, turn the crankshaft
counterclockwise 430° (i.e., 360° plus an
additional 70°).
b. When piston #2 is at TDC on the compres-
sion stroke, align the "T2" mark a with the
stationary pointer b.
c. Install the camshaft sprockets onto the
camshafts.
Refer to the camshaft sprocket installation
steps below.
NOTE:
@
Make sure the "FRONT" marks 1 on the cam-
shaft sprockets face away from the "IN" 2 and
"EX" marks 3 on the camshafts.
@
d. Turn the camshafts by hand so that the
camshaft timing marks (o: big hole) face up.
2. Install:
• intake camshaft sprocket
• exhaust camshaft sprocket
(onto the camshafts)
a. Align the "T2" mark on the generator rotor
with the stationary pointer.
b. Install the camshaft sprocket with the
"FRONT" mark facing out, and then finger
tighten the camshaft sprocket bolts.
c. Turn the intake and exhaust camshafts and
align the camshaft timing marks (o: big
hole) with the camshaft cap marks.
3. Measure:
• valve clearance
Out of specification → Adjust.
Refer to
CLEARANCE" in chapter 3.
4 - 19
ENG
"ADJUSTING THE VALVE