Yamaha 2004 YP400, Service Manual, Page: 226 / 417

5 - 13
ENG
CAMSHAFTS
EAS00210
CHECKING THE TIMING CHAIN
TENSIONER
1. Check:
• timing chain tensioner
Cracks/damage/rough movement
→
Replace.
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a. While lightly pressing the timing chain ten-
sioner rod by hand, turn the tensioner rod
fully clockwise with a thin screwdriver
1
.
b. Remove the screwdriver and slowly release
the timing chain tensioner rod.
c. Make sure that the timing chain tensioner
rod comes out of the timing chain tensioner
housing smoothly. If there is rough move-
ment, replace the timing chain tensioner.
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EAS00217
INSTALLING THE CAMSHAFTS
1. Install:
• decompressor lever pin
1
• decompressor lever
2
• exhaust camshaft
3
NOTE:
_
Install the decompressor lever pin
1
and
decompressor lever
2
in the exhaust cam-
shaft
3
as shown in the illustration.
2. Install:
• exhaust camshaft sprocket
1
• intake camshaft sprocket
2
NOTE:
• Make sure that the punch marks
a
on the
camshaft sprockets are in the position shown
in the illustration.
• Temporarily tighten the camshaft sprocket
bolts.
2
1
3
2
1
a
a