Yamaha YFZ450S 2003 Service Manual page 160

2
CAMSHAFTS
d. Remove the screwdriver, mark sure that the
timing chain tensioner rod releases, and
then tighten the cap bolt to the specified
torque.
Tensioner cap bolt
7 Nm (0.7 m · kg, 5.1 ft · lb)
L LLL L LLL L L LLL
4. Turn:
• crankshaft
(counterclockwise several turns)
5. Check:
• A.C. magneto rotor "I" mark
Align with the A.C. magneto cover station-
ary pointer.
• camshaft sprocket punch marks
Align with the cylinder head mating surface.
Out of alignment → Adjust.
Refer to "INSTALLING THE CAMSHAFTS".
6. Measure:
• valve clearance
Out of specification → Adjust.
Refer to
CLEARANCE" in chapter 3.
7. Install:
• timing chain guide (top side)
• cylinder head cover gasket
• cylinder head cover
NOTE:
• Apply Sealant (Quick Gasket
bond No. 1215 1 onto the mating surfaces
of the cylinder head cover and cylinder head
cover gasket.
• Apply Sealant (Quick Gasket
bond No. 1215 2 onto the mating surfaces
of the cylinder head cover gasket and cylin-
der head.
4 - 17
ENG
L L LLL L L LLL L
"ADJUSTING THE
New
10 Nm (1.0 m · kg, 7.2 ft · lb)
®
) or Yamaha
®
) or Yamaha
L LLL L LLL
VALVE