CAMSHAFTS

ENG

4.Measure:

Camshaft-to-cap clearance

Out of specification Measure cam- shaft journal 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 circlip, 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 journal diameter a

Out of specification Replace the

camshaft.

Within specification Replace cam- shaft case and camshaft caps as a set.

Camshaft journal 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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Yamaha WR45OFR service manual Bolt camshaft cap 10 Nm 1.0 m kg, 7.2 ft lb