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Honda CRF450R
Specifications
Engine Liquid-cooled 4-stroke 4-valve SOHC single
Displacement 449 cm³
Bore × Stroke 96 × 62.1 mm
Compression Ratio 12 : 1
Max. Power Output 41.5 kW / 8,500 min-¹ (95/1/EC)
Max. Torque 50.3 Nm / 7,000 min-¹ (95/1/EC)
Carburation PGM-FI electronic fuel injection
Ignition System Full transistor with digital ignition
Starter Primary kick
Transmission 5-speed
Final Drive #520 roller chain
Wheelbase 1,491 mm
Seat Height 954 mm
Ground Clearance 332 mm
Fuel Tank Capacity 5.7 litres
Suspension Front 48 mm inverted leading-axle
twin-chamber cartridge-type telescopic fork
with 16-step adjustable compression and
18-step rebound damping; 310 mm suspension travel
Suspension Rear Pro-Link with damper, adjustable
low-speed (18-step) & high-speed (1.5-turn) compression
and 20-step rebound damping; 320 mm axle travel
Wheels Front & Rear Aluminium rim / wire spoke
Tyres Front 80/100 - 21 (51M)
Tyres Rear 110/90 - 19 (62M)
Brakes Front 240 mm hydraulic disc
with dual-piston calliper and sintered metal pads
Brakes Rear 240 mm hydraulic disc
with single-piston calliper and sintered metal pads
Frame Aluminium twin-spar
Caster Angle 26° 52'
Trail 114.2 mm
Kerb Weight 106.9 kg
Overview
Honda’s all-conquering CRF450R has become the overwhelming first choice of motocross, flattrack and Supermoto riders around the world who’ll settle for nothing less than the best of the breed to carry them to victory. Powered by a remarkable Unicam 4-stroke engine that pumps out roost-raising leaps of performance at the twist of its throttle, the CRF450R’s light and rigid aluminium frame and responsive Works racer suspension systems are now complemented by a revolutionary new Honda Progressive Steering Damper.
Fuel Injection:
The new lightweight, battery-less fuel injection/ignition system delivers enhanced performance, a wider, higher power range and improved power delivery, as well as kick-start capability. It also has an indicator integrated with the engine stop switch which displays pre-race conditions of the fuel injection system for Motocross racers.
Honda Progressive Steering Damper:
The lightweight and compact Honda Progressive Steering Damper (HPSD) was developed by Team Honda for improved cornering ability and reduced rider fatigue. HPSD features a compact and rugged hydraulic damper attached between the steering head and the lower triple-clamp to augment more aggressive steering characteristics and assist straight-line handling. The steering damper is re-valved for more linear damping, whilst its progressive damping action smoothly increases with handlebar deflection. This produces very natural steering characteristics and feel.
Insane Power Delivery:
The powerful 4-stroke 4-valve Unicam engine churns out 41.5kW of power at 8500rpm and 50.3Nm of torque at 7000prm. Power is produced across a broader rpm-band for smoother, easier operation. An improved clutch action gives smoother up and down shifting which decreases rider fatigue and increases control.
New Suspension Setup:
New, KYB (Kayaba) rear damper and bigger (48mm) KYB front fork give a better stroke feel, action and control for a plush overall feel and improved bump impact.
Information from: http://www.honda.co.za/main.aspx?id=72&pid=38&cid=15
