Yamaha YZ250F 2004 Manuel D'atelier Du Proprietaire page 306

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Table des Matières

Fit the timing chain 3 onto both camshaft

sprockets and install the camshafts on the

cylinder head.

The camshafts should be installed onto the

cylinder head so that the punch mark c on

the exhaust camshaft and the punch mark

d on the intake camshaft must align with

the cylinder head surface, as shown in the

illustration.

Do not turn the crankshaft during the

improper valve timing will result.

Install the clips, camshaft caps 4 and

bolts (camshaft cap) 5.

Bolt (camshaft cap):

10 Nm (1.0 m • kg, 7.2 ft • lb)

Before removing the clips, cover the cylin-

der head with a clean rag to prevent the

clips from into the cylinder head cavity.

Apply the engine oil on the thread and con-

tact surface of the bolts (camshaft cap).

Tighten the bolts (camshaft cap) in a criss-

cross pattern.

The bolts (camshaft cap) must be tight-

ened evenly, or damage to the cylinder

head, camshaft caps, and camshaft will

Timing chain tensioner

Installation steps:

While pressing the tensioner rod lightly

with fingers, use a thin screwdriver and

wind the tensioner rod up fully clockwise.

installation.