Yamaha 2004 YP400 Service Manual page 227

3
d
c
CAMSHAFTS
3. Install:
• intake camshaft 1
• exhaust camshaft 2
1
M MMM
a. Turn the primary sheave nut on the left side
of the crankshaft counterclockwise to turn
2 the crankshaft.
b. When piston is at TDC on the compression
stroke, align the "I" mark a on the genera-
tor rotor with the stationary pointer b on the
generator rotor cover.
c. Install the timing chain 3 onto both cam-
shaft sprockets, and then install the cam-
shafts onto the cylinder head.
NOTE:
The camshafts should be installed onto the
cylinder head so that the punch marks c on
the intake camshaft sprocket and the punch
mark d on the exhaust camshaft sprocket
align with the cylinder head mating surface, as
shown in the illustration.
CAUTION:
_
Do not turn the crankshaft when installing
the camshafts to avoid damage or improper
valve timing.
L LLL
4. Install:
• dowel pins
• camshaft cap
• camshaft cap bolts
NOTE:
• Lubricate the camshaft cap bolt threads with
engine oil.
• Finger tighten the camshaft cap bolts.
5. Tighten:
• camshaft cap bolts
NOTE:
_
Tighten the camshaft cap bolts in the order of
the embossed numbers on the camshaft cap.
5 - 14
M MMM M M MMM M M MMM M
L LLL L L LLL L L LLL L
10 Nm (1.0 m · kg, 7.2 ft · lb)
ENG
M MMM M M MMM M MMM
L LLL L L LLL L LLL