Honda CRF450R 2007 Service Manual

r'-,
1
l
Be careful not to
drop the bolts i nt o
the cran kca se .
Insert the stopper tool in to the cam chain tensioner
lifter.
Turn the stopper tool clockwise fully and lock the
cam chain tensioner lifter by pushing the handle.
TOOL :
Ten sio nar stopper 070MG-00101DO or
07AMG-001A 100
(U.S.A. only)
CYLINDER HEADIVALVES
TENSIONER STOPPER
A tool ca n easily be made fr om a thin (1 mm thick ) ~= ================= =;
piece of steel as shown.
Insert the special tool i nto the sprocket , over the
gasket surface and loosen the one cam sproc ket
bolt.
• When the decomp ressor cam assembly will be
disassembled, loosen the mounting bolt, but do
n ot r emove it yet.
TOOL:
Cam s procket holder 07AMB-MEBA100 (U.S.A. only)
8.5 m
i
0
m~
Remove the special tool, turn the crankshaft clock- I ~ ;~E;:;~
wise one turn and reinsert the spedal tool int o the
sprocket. R emove the other cam sprocket bolt.
Then r emove the another cam sprocket bolt using
the same procedure as removal of the othe r cam
sprocket bolt.
Remove the cam sprocket from the camshaft. and
suspend the
cam chain wit h a piece of wi re to pre-
vent it from falling into the crankcase.
Make sure
the piston is at TDC (Top Dead Center) on "',.,. ... "'
the comp ression stroke.
Loosen the
camshaft holder bolts in a crisscross
pane rn in two or three steps.
Remove the camshaft h older assembly .
• Valve lifters are installed into the camsha ft
holder assembly.
• The shims may stick to the inside of the valv e lift -
ers. Do
not allow the shims to fall into the crank-
case.
19 mm
12 mm
+
3.5 m m
r
9-9

Honda CRF450R 2007 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	5-speed
Final Drive	#520 chain; 13T/48T
Front Suspension	47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Front Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	110/90-19
Wheelbase	58.3 inches
Seat Height	37.6 inches
Fuel Capacity	1.9 gallons
Induction	Keihin 40mm carburetor
Ignition	CDI
Rear Suspension	Pro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and compression damping adjustment
Trail	4.6 inches