Honda CRF450R 2012 Service Manual

CYLINDER/PISTON
CYLINDER INSTALLATION
Install the dowel pins.
Install a new cylinder base gasket on the crankcase.
Avoid piston ring Coat the cyli nder bore, piston and piston r ings with l ~ !l~ N]fR'"
damago during engine oil and install the cylin der while compress-
installarion. in9 the piston rings.
10-10
Install the cyl inder mounting bo l t.
• After tightening the cylinder head mou n ting nut,
tighten the
cylinder mo u nting bolt securely.
Install a new gasket, cam chain tensioner lifte r and
bolts.
Tighten the bolts to the specified torque.
TORQUE: 12 N'm (1.2
kgf·m, 9 Ibf.ft)
•

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