Yamaha 2011 WR250FA, Owner'S Service Manual

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CAMSHAFTS
2. Install:
• Timing chain tensioner
Installation steps:
a. While pressing the tensioner rod lightly with
fingers, use a thin screwdriver and wind the
tensioner rod up fully clockwise.
b. With the rod fully wound and the chain ten-
sioner UP mark "a" facing upward, install the
gasket "1" and the timing chain tensioner
"2", and tighten the bolt "3" to the specified
torque.
c. Release the screwdriver, check the tension-
er rod to come out and tighten the gasket "4"
and the cap bolt "5" to the specified torque.
3. Turn:
• Crankshaft
Counterclockwise several turns.
4. Check:
• Rotor T.D.C. mark
Align with the crankcase align mark.
• Camshaft match marks
Align with the cylinder head surface.
Out of alignment
→
Adjust.
5. Install:
• Timing mark accessing screw "1"
• Crankshaft end accessing screw "2"
6. Install:
• Timing chain guide (top side) "1"
• Cylinder head cover gasket "2"
• Cylinder head cover "3"
• Bolt (cylinder head cover) "4"
Apply the sealant on the cylinder head cover
gasket.
Bolt (timing chain tensioner):
10 Nm (1.0 m•kg, 7.2 ft•lb)
Tensioner cap bolt:
7 Nm (0.7 m•kg, 5.1 ft•lb)
Bolt (cylinder head cover):
10 Nm (1.0 m•kg, 7.2 ft•lb)
YAMAHA Bond No. 1215 (Three-
Bond
®
No. 1215):
90890-85505