Yamaha YZ250F 2004 Manuel D'atelier Du Proprietaire page 310

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• With the rod fully wound and the chain ten-
sioner UP mark a facing upward, install
the gasket 1 and the timing chain ten-
sioner 2, and tighten the bolt 3 to the
specified torque.
• Release the screwdriver, check the ten-
sioner rod to come out and tighten the
gasket 4 and the cap bolt 5 to the speci-
fied torque.
4
5
3. Turn:
• Crankshaft
4. Check:
• Rotor T.D.C. mark
• Camshaft match marks
5. Install:
• Timing mark accessing screw 1
• Crankshaft end accessing screw 2
4 - 28
CAMSHAFTS
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)
Counterclockwise several turns.
Align with the crankcase align mark.
Align with the cylinder head surface.
Out of alignment → Adjust.
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Yz250ft 2004

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