SHERCO 2012 SE 250i-R, Shop Manual, Page: 16 / 55

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Check the camshafts for wear:
•
Remove the camshafts.
•
Measure the heights [A] of the camshaft
lobes with a micrometer.
If the cams are worn beyond the limits, replace
the cams.
Camshaft height limit
Exhaust: 31.40 mm
Intake: 32.28 mm
Checking the camshafts and camshaft journals
for wear:
•
Measure the clearance between the
camshaft and the camshaft journals using
plastigage [A].
Lubricate the fixing bolts with engine oil and
tighten to the proper torque.
Tightening torque
Camshaft journal mounting bolts: 10 Nm
If any of the measurements are over the limit,
then measure the diameter of each journal.
Camshaft / journal clearance
Standard: 0.020 – 0.062 mm
Limit: 0.15 mm
If the diameter of the journal is below the limit
replace the camshaft and measure again.
Camshaft journal diameter
Standard: 22.967 – 22.98 mm
Limit 22.938 mm
If the clearance is outside of the tolerance
limits, replace the entire cylinder head.
Eccentricity of the camshaft:
Measure the camshaft runout.
If it is out of tolerance, replace the camshaft.
Runout: Less than 0.03 mm