Honda CRF450R 2009 Service Manual page 350

CRANKCASE/CRANKSHAFTfTRANSMISSION/BALANCER
CRANKSHAFT
REMOVAL
Separate the crankcase halves (page 13-10).
Remove the crankshaft from the left crankcase.
INSPECTION
CRANKSHAFT
Turn the inner race of both crankshaft bearings with , - - - - -- - - - - - - - - - - - - ,
your finger.
The bearings should turn smoothly and quietly.
Also check that the bearing Quter race fits tightly in the
crankcase.
Replace the bearings
if
necessary (page 13-24).
Be
careful not /0
Place the crankshaft on a stand or V-blocks.
damage the main Set the dial indicator as shown.
journal.
Rotate the crankshaft two revolutions (720°) and read
the runout.
13·22
SERVICE LIMIT: 0.05 mm (0.002 in)
Measure the connecting rod big end radial clearance in
both X and Y directions.
SERVICE LIMIT: 0.05
mm
(0.002 In)
8.0
mm
(0.31
in)
8.0 mm (O.31 in)