- Check that the cylinder head cover surface, the
intake manifold and the exhaust manifold are not
worn.
Standard diameter
A Ø 12.000 ÷ 12.018 mm
B Ø 20.000 ÷ 20.021 mm
C Ø 37.000 ÷ 37.025 mm
Inspecting the timing system components
- Check that the guide slider and the tensioner
slider are not worn out.
- Ensure that the camshaft control pulley chain as-
sembly and the sprocket wheel are not worn.
- If you detect wear, replace the parts or, if the
chain, sprocket wheel and pulley are worn, replace
the whole unit.
- Remove the centre screw with the washer and
the tensioner spring. Check that the one-way
mechanism is not worn.
- Check the condition of the tensioner spring.
- If examples of wear are found, replace the whole
unit.
X9 Evolution 125 Engine
ENG - 125
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