Yamaha 2004 YP400 Service Manual page 228

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CAMSHAFTS
CAUTION:
_
The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft cap, and camshafts will result.
6. Install:
• timing chain tensioner
M MMM M MMM M M MMM M
a. While lightly pressing the timing chain ten-
sioner rod by hand, turn the tensioner rod
fully clockwise with a thin screwdriver 1.
b. With the timing chain tensioner rod turned
all the way into the timing chain tensioner
housing (with the thin screwdriver still
installed), install the gasket and the timing
chain tensioner 2 onto the cylinder block.
WARNING
_
Always use a new gasket.
c. Tighten the timing chain tensioner bolts 3
to the specified torque.
Timing chain tensioner bolt
10 Nm (1.0 m · kg, 7.2 ft · lb)
d. Remove the screwdriver, make sure the tim-
ing chain tensioner rod releases, and then
tighten the cap bolt to the specified torque.
Cap bolt
7 Nm (0.7 m · kg, 5.1 ft · lb)
L LLL L LLL L L LLL L
7. Tighten:
• camshaft sprocket bolts 1
ENG
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
20 Nm (2.0 m · kg, 14 ft · lb)
MMM
LLL