Honda CRF450R 2012 Service Manual

CYLINDER/PISTON
PISTON REMOVAL
Places clean shop Remove the pist on pin clips with pliers.
towel ovef the
Press the piston pin out of the piston and remove
the piston.
crankcase to
prevent the clip
from falling into the • Under racing conditions, the piston and piston
rings sho uld be r ep laced according to the com-
petiti on maintenance schedule (page 4·6).
crankcase.
PISTON RING REMOVAL
Do nor damage the Spread the piston rings and remove them by lifting
piston ring by up at a point just opposite the gap.
spreading the ends
/00 faf.
10-6
CYLINDER INSPECTION
Inspect the cy linder bore for wear or damage.
Measure
the cyl inder tD. in the X and Y axes at
three levels.
Take the maximum reading to determine the c ylin -
der wear .
SERVICE LIMIT: 96.025 mm (3.7805 in)
Calculate the cylinde r- to - piston clearance.
Take a
maximum reading to determine the clear-
ance.
For piston
0.0. (page 10-7).
SERVICE
LIMIT : 0.085 mm (0.0033 in)
Calculate the taper and out -of· round at three levels
in the X and Y axes. Take the ma ximu m r eading to
determine the cy l inder condition.
SERVICE LIMITS:
Taper: 0. 010 mm (0.0004 in)
Out-oJ-round:
0.010 mm (0.0004 in)
\~- Y -~j
TOP X
......... ..-/
MIDDLE
".::= -=--------
'-- - -'--~/
BonOM
-- ;--- .......
" ,
'------ -- -- - _/
'-. /'

Honda CRF450R 2012 Specifications

General

Brand	Honda
Model	CRF450R 2012
Category	Motorcycle
Language	English