Honda CRF450R 2012 Service Manual

CRANKCASE/CRANKSHAFT /TRANSMISSION/BALANCER
BALANCER GEAR/BALANCER
REMOVAL
Remove the following :
- Rig ht crankcase cover (page 11-51
- l eft crankcase cover (page 12-4)
- Clutch (page ' ' -7)
- Starter clutch (page 11 -'9)
Insert the gear holder between the balan ce r drive
and driven gears.
TOOL:
Gsar holder , Ml .5
07724·0010200
or
07724·001A200
(U.S.A. only)
Rem ove the balancer shaft nut and washer us i ng
the special tools.
TOOL S:
lo ck nut wrench , 20 x 24 mm 07716·0020100
Extension bar 07716·0020500 or
commerciallyavail -
able equiva l ent
(U.S.A. on ly )
Remove the balancer
drive and driven gear s.
Turn the balancer shaft as shown and remo ve it.
INSPECTION
Check the balancer shah for wear, damage or exces-
sive scratches.
Check the balancer shah gear for wear or damage.
Check the balancer drive/d riven gear for wear or
damage.
INSTALLATION
Enf1lJge the Install the balancer shaft into the crankcase as
balancer shBft gear shown .
port/Otl WIth the oil
pump driven gear.
13-8
Install the balancer drive gear whi le aligning it s
wide cut-out in the splines with the punch mark on
the crankshaft.

Honda CRF450R 2012 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.5:1
Induction	Programmed Fuel Injection (PGM-FI), 46mm throttle body
Ignition	CDI
Transmission	Close-ratio five-speed
Final Drive	#520 chain; 13T/48T
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	120/80-19
Seat Height	37.6 inches
Ground Clearance	13.2 inches
Front Suspension	12.2 inches travel
Rear Suspension	Pro-Link Showa single shock with spring preload, rebound and compression damping adjustability; 12.4 inches travel
Rake	27° 04'
Trail	4.6 inches
Wheelbase	58.3 inches
Curb Weight	249 pounds