Yamaha WR250FM service manual Bolt camshaft cap 10 Nm 1.0 m kg, 7.2 ft lb

CAMSHAFTS

ENG

4.Measure:

•Camshaft-to-cap clearance

Out of specification → Measure camshaft outside diameter.

Camshaft-to-cap clearance: 0.020 ~ 0.054 mm

(0.0008 ~ 0.0021 in) <Limit>: 0.08 mm (0.003 in)

Measurement steps:

•Install the camshaft onto the cylinder head.

•Position a strip of Plastigauge® 1 onto the camshaft.

•Install the clip, dowel pins and camshaft caps.

T .

R .

Bolt (camshaft cap):

10 Nm (1.0 m • kg, 7.2 ft • lb)

NOTE:

•Tighten the bolts (camshaft cap) in a criss- cross pattern from innermost to outer caps.

•Do not turn the camshaft when measuring clearance with the Plastigauge®.

•Remove the camshaft caps and measure the width of the Plastigauge® 1.

5.Measure:

•Camshaft outside diameter a

Out of specification → Replace the cam-

shaft.

Within specification → Replace camshaft case and camshaft caps as a set.

Camshaft outside diameter: 21.967 ~ 21.980 mm (0.8648 ~ 0.8654 in)

Camshaft sprocket

1.Inspect:

•Camshaft sprocket 1

Wear/damage → Replace the camshaft assembly and timing chain as a set.

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