Honda CRF450R 2013 User Manual

Piston/Piston Rings/Piston Pin
76 Servicing Your Honda
Piston/Piston Rings/Piston Pin
1. Clean the area above the engine before
disassembly to prevent dirt falling into the
engine.
2. Drain the radiator coolant after cooling the
motorcycle (page 145).
3. Remove the seat and hang the fuel tank (pages
33, 34).
4. Remove the left and right mufflers (page 100)
and subframe (page 37).
5. Remove the exhaust pipe (page 103).
6. Remove the spark plug (page 66).
7. Remove the cylinder head cover (page 67).
8. Set the piston at TDC on the compression
stroke (page 67).
9. Remove the camshaft holder, camshaft, valve
lifters and shims (page 69).
10. Disconnect the ignition coil connectors (1).
Remove the ignition coil (2) by removing the
bolts (3).
11. Disconnect the ECT sensor connector (4).
12. Loosen the radiator hose clamp screw (5) and
disconnect the radiator hose (6).
13. Disconnect the crankcase breather tube A (7)
and B (8) from the air cleaner connecting tube.
14. Disconnect the IAT sensor connector (9).
15. Loosen the screw (10) on the air cleaner
connecting tube clamp (11).
Cylinder Head Removal
(1) ignition coil connectors (3) bolts
(2) ignition coil
(3)
(2)
(1)
(4) ECT sensor connector
(5) radiator hose clamp screw
(6) radiator hose
(4)
(6)
(5)
(7) crankcase breather tube A
(8) crankcase breather tube B
(9) IAT sensor connector
(10) screw
(11) air cleaner connecting tube clamp
(8)
(9)
(7)
(10)
(11)

Honda CRF450R 2013 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	PGM-FI, 46mm throttle body
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
Wheelbase	58.7 inches
Seat Height	37.6 inches
Fuel Capacity	1.7 gallons
Ground Clearance	13.0 inches
Front Suspension	48mm inverted Kayaba PSF (Pneumatic Spring Fork) with air-adjustable spring rate, rebound and compression damping adjustability; 12.2 inches travel
Rear Suspension	Pro-Link single shock with adjustable spring preload, rebound and compression damping adjustability; 12.4 inches travel
Trail	4.6 inches