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Combining since 2002 a benchmark chassis with an engine overflowing with power and torque, the CRF 450 R has demonstrated its winning potential to professional pilots while its reliability, resistance and the quality of its manufacture. have also made it very popular among amateurs.
The 2013 vintage of the CRF 450 R was distinguished by a new framework favoring the centralization of the masses but also by its KYB inverted oleopneumatic fork, a set which marked a major evolution by allowing the pilot to make the most of the performance of his vehicle without effort. motorcycle, whether on the ground or in the air.
After fierce competition, the CRF 450 R has established itself and become the best-selling MX 450 in Europe. A reference that served as a basis for the engineers of the HRC for a 2014 version even more powerful thanks to a long list of details and improvements.
Delivering high torque values from the lowest revs, the 449cc single cylinder of the CRF 450 R benefits from a new dual injection sequence programming, an improved twin silencer as well as lighter clutch springs. These modifications aim to provide the most direct and precise connection possible with the rear tire, favoring propulsion and the rider’s feeling of all the grip available. The work done by the engine manufacturers on the intake and exhaust ducts also made it possible to increase the speed and obtain a higher power in the revs..
The 6th generation aluminum double-beam frame remains unchanged for 2014, as does the swingarm and the Pro-Link rear suspension gearbox. The rebound and compression settings have been revised on the KYB shock absorber while at the front, the inverted fork of ø 48 mm also benefits from internal modifications for more efficiency in damping.
The characteristic styling of the CRF 450 R – combining simple form and pure function – is maintained, allowing the rider intuitive freedom of movement on the motorcycle. Finally, the graphics, which mixes red and white, highlight the competition heritage dear to Honda..
Motorization
The characteristic dimensions of the water-cooled Unicam 4-valve single cylinder remain fixed at 96 x 62.1 mm, with valves of 36 mm at the intake and 31 mm at the exhaust. Intake and exhaust ducts have been redesigned to improve gas flow and combustion efficiency, measures complemented by the adoption of a new PGM-FI dual-sequence injection system which offers even more sensitivity at mid-range. The diameter of the injector body is 46 mm while the compression ratio is 12.5 to 1.
The application on the piston skirt of molybdenum disulfide limits friction while nozzles with 2 nozzles are used to promote cooling of the internal face of the piston. Channeling power and torque, the clutch inherits new springs to soften the drive without losing efficiency or resistance. The 5-speed gearbox remains unchanged.
The short double exhaust – another essential component of the mass centralization process presents new internal arrangements since the left / right junction area has been optimized in order to improve the balance and the pressure of the gas flow. More generally, the changes made to the CRF 450 R engine are reflected in 3 ways: higher torque at low revs for better cornering, greater sensitivity when the throttle is only partially open for better control and finally power. higher at high speeds allowing to stay longer in the same gear.
Part-cycle
In order to give the front tire the most effective grip characteristics possible, the double beam aluminum frame (9.35 kg) of the CRF 450 R has been designed “around” the KYB 48 mm oil-pneumatic fork. The in-depth work carried out on the centralization of the masses and on the lowering of the center of gravity made it possible to reduce inertia while increasing stability at high speed. The caster angle of 27.067 °, drag of 116 mm and wheelbase of 1492 mm translate into particularly lively and dynamic handling as well as a feeling of increased traction. The total weight of the machine is only 111 kg all full.
The KYB oleopneumatic fork retains its advantages over conventional models with steel springs, in particular a significantly reduced weight and more reactivity during the phases between compression and expansion. For 2014, the fork receives new rebound pistons, new rods and new hydraulic thrust guides to aid oil flow, damping characteristics and weight. Because in a sport where the smallest profits count, the 25 g gained on the fork are also important. Travel remains at 310 mm.
Fully adjustable in rebound and damping, the fork can also be adjusted in preload thanks to a “Schrader” type air valve placed at the top of the legs. The standard pressure is 230kPa (33psi), the minimum is 220kPa (32psi) and the maximum allowable is 250kPa (36psi). The CRF 450 R can thus be strapped for transport by simply releasing the pressure without risk of damaging the seals..
The aluminum swingarm guarantees both maximum rigidity in ruts and improved traction out of bends. It works in concert with a compact and fully adjustable KYB mono shock absorber (preload, rebound and compression at slow and fast speeds). The benefit of mass centralization in this zone is reflected in the form of a decrease in inertia in the axis of the machine: thus it is possible to brake harder without compromising stability. The shock absorber stroke is 133.5 mm for a travel of 315 mm at the wheel.
Careful arrangement of the equipment around the frame contributes to the centralization of the masses: all the electrical components – electronic control unit, capacitor, regulator and electrical harness – are concentrated around the injector body.
The casing of the CRF 450 R 2014 retains the principle of “triangular proportions” which has long characterized the machines in the CRF range. Another principle used by engineers during development was that of “maximum human for minimum mechanics” R In other words, the machine is built around humans and that is why the ergonomics and mass centralization are at the heart of the forms of the CRF 450 R.
The radiator scoops (designed to optimize the flow of incoming and outgoing air), the side covers, the ultralight saddle or the fuel tank (6.4 liters) have a continuity of shape which gives the rider a significant freedom of movement and fluidity of movement.
The front disc cover comes in two parts to facilitate maintenance of the “petal” disc. ø 240 mm and its double piston caliper. The rear disc of the same diameter is associated with a single piston caliper with sintered pads (same as before). Aluminum hubs limit the weight of the wheels, the dimensions and fitting of which remain classic: 21 x 1.6 and 80 / 100-21 tires for the front, 19 x 2.5 and 110-90 / 19 casing for the rear.
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CRF 450 R 2013
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2021
The technical aspect
2014 Honda CRF 450 R
- Frame
- Frame: Double beam, single split aluminum cradle
- Tank: 6.4 liters
- Seat height: 953 mm
- Length: 2191 mm
- Width: 827 mm
- Height: 1,271 mm
- Wheelbase: 1492 mm
- Weight in running order: 111 kg
- Train before
- WP inverted telehydraulic fork Ø 48 mm, deb: 310 mm
- 1 disc Ø 240 mm, 2 piston caliper
- Front wheel:
80/100
– 21
- Transmission
- 5-speed gearbox
- Secondary chain transmission
- Rear axle
- Mono-shock absorber, deb: 315 mm
- 1 disc Ø 240 mm, 1 piston caliper
- Rear wheel:
120/90
– 19
- Motor
- Single cylinder
in line
, 4 stroke - Cooling: by water
- Injection Ø 46 mm
- 1 ACT
- 4 valves
-
449.70 cc
(96 x 62.1 mm) -
≈ 51
ch - Compression: 12.5: 1
- Crit’air:
Detached pieces
exhaust
motor
fluid
electricity
filtration
braking
chain kit
Competitors
2014 KTM 450 SX-F
Yamaha YZ 450 F 2014
Kawasaki KX 450 F 2014
Suzuki RM-Z 450 2014
Gallery
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