Motorcycle Race

Honda CRF450F 2011

Battery-less FI system with new tapered injector delivers excellent bottom to mid-range drivability, smooth power delivery in high altitudes and enhanced fuel efficiency.
- New fuel pump module with filter replacement kit for easier maintenance and extended lifetime.
- Rugged and lightweight Honda Progressive Steering Damper with larger cylinder diameter for improved steering precision
and stability with increased low-speed damping force.
- New, narrower throttle body enhances bottom to mid-range power and torque feel, and improves throttle control.
- KYB front fork features new piston shape, oil seal, oil settings and valving for improved control, balance and fork action.
- Powerful but lightweight Unicam engine features revised ECU settings to improve starting and on/off throttle control.
- Low mass centralisation gives a highly controlled ride feel and makes jumping and manoeuvring in the air easier.
- New chain guide design simplifies maintenance and improves durability.
- Rugged 5th generation twin-spar aluminium frame with rigidity optimised to match new muffler and enhance control.
-New, longer, high capacity SUS muffler plus new air box and side covers deliver optimal power and torque feel, while reducing noise to comply with mandatory FIM regulations.
- New settings and a refined Pro-Link ratio for improved suspension action and enhanced machine balance.

Model CRF450R
Mold Type ED-type

Type Liquid-cooled 4-stroke 4-valve OHC single
Displacement 449.7cm³
Bore x Stroke 96 x 62.1mm
Compression Ratio 12 : 1
Max. Power Output 40.9kW / 8,500min-1 (95/1/EC)
Max. Torque 50.5Nm / 7,000min-1 (95/1/EC)

Carburation PGM-FI electronic fuel injection
Fuel Tank Capacity 5.7 litres
Electrical System
Ignition System Full transistor with digital ignition
Starter Primary kick

Clutch Wet, multiplate
Transmission 5-speed constant mesh
Primary Reduction 2.739 (63/23)
Gear Ratios
1 1.800 (27/15)
2 1.470 (25/17)
3 1.235 (21/17)
4 1.050 (21/20)
5 0.909 (20/22)
Final Reduction 3.692 (48/13)
Final Drive #520 roller chain

Type Aluminium twin-spar

Dimensions 2,191 x 827 x 1,273mm
Wheelbase 1,491mm
Caster Angle 26° 53
Trail 114.5mm
Seat Height 954mm
Ground Clearance 332mm
Kerb Weight 107.6kg (F: 53.2kg; R: 54.4kg)

Front
48mm inverted KYB leading-axle twinchamber
cartridge-type telescopic fork with
18-step adjustable compression and 18-
step rebound damping; 273mm axle travel
Rear
Pro-Link with KYB damper, adjustable lowspeed
(18-step) and high-speed (1.5-turn)
compression and 20-step rebound damping;
320mm axle travel

Front Aluminium rim/wire spoke
Rear Aluminium rim/wire spoke
Rim Size Front 21 x 1.60
Rear 19 x 2.15
Tyre Size Front 80/100 21 (51M)
Rear 110/90 19 (62M)

Front
240mm x 3mm hydraulic disc with dualpiston
caliper and sintered metal pads
Rear
240mm x 4mm hydraulic disc with singlepiston
caliper and sintered metal pads