Honda CRF450R 2012 Service Manual

CYLINDER HEADIVALVES
9-20
CAMSHAFT
Turn the outer race of the camshaft bearing with
your finger.
The bearing should turn smoothly and quiet l y.
Also check that the bear ing inner race fits tigh t ly on
the camshaft.
Replace th e camshaft assembly if the bearing does
not turn smoothly, quietly or if it fits loosely on the
camshaft.
Check the cam lobe surfaces for scoring or evidence
of insufficient lubricant.
Measure the height of each cam lobe.
SERVICE LIMITS :
IN: 36.890 mm (1 . 45 24 in)
EX: 35 .063 mm (1.3804 in)
NOTE:
Check the rocker arm if the cam lobe is worn or
damage.
OECOMPRESSOR SHAFT /PLUNGER
Check the d ecompressor shaft for bend or damage.
Check the decompressor pl unger fo r wear or dam-
age.
Replace them if necessary.
C AM SPROCKET/ DECOMPRESSOR WEIGHT !
SPRING
Check the cam sprocket teeth for wear or damage.
Check the decompressor weight for damage .
Check the spring for fa t igue by moving the
decompressor weight with your finger.
Replace the cam sprocket, decompresso r we ight
and
spring as an assembly if necessary.
PLUNGER
SHAFT
CAM SPROCKET
DE(:O.WR IESS'ORWEIGHT
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Honda CRF450R 2012 Specifications

General

Brand	Honda
Model	CRF450R 2012
Category	Motorcycle
Language	English