Honda CRF450R 2011 Service Manual

MAINTENANCE
Record the
clearance for each
valve
for reference
in shim selection if
adjust ment is
required.
4-16
Exhau st s id e:
Insert a feeler gauge between the rocker arm and
shim.
Check the valve clearance for the exh aust valves
using a feeler gauge.
VALVE CLEARANCE:
E X: 0. 28 ± 0.03 mm (0. 011 ± 0.001 in)
VALVE CLEARANCE ADJUSTMENT
Remove the camshaft holder assembly.
- '05 - '07: (page 9-8)
- After '07: (page 9-16)
• The shims may stick to the inside of the valve
lifter. Do not allow the shims to fall i nto the
crankcase.
Remove
the shims.
• Mark all valve lifters and shims to ensure correct
reassembly in their or iginal locations.
• The shims can be easily removed with tweezers
or a magnet.
Clean the va l ve shim contact area in the valve lifter
with comp ressed ai r.
•
VA L VE LIFTER
•

Honda CRF450R 2011 Specifications

General

Engine Type	449cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	96.0mm x 62.1mm
Compression Ratio	12.0:1
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
Trail	114mm (4.5 inches)
Induction	PGM-FI, 46mm throttle body
Front Suspension	48mm inverted with rebound and compression damping adjustability; 12.2 inches travel
Rear Suspension	Pro-Link single shock with rebound and compression damping adjustability; 12.4 inches of travel
Wheelbase	58.7 inches
Seat Height	37.6 inches
Fuel Capacity	1.5 gallons