Kawasaki KX450F

The Kawasaki KX450F motocross bike model was first introduced at the 2005 MX tournament in Japan, where critical problems in the frame design immediately surfaced, due to which the start of official sales was postponed for a year, and after the problem was resolved. by 2006, the Kawasaki KX450F officially went into production.

The new model positioned itself as a replacement for the 2-stroke version of Kawasaki KX500 (replacement of 2-stroke crosses with 4-stroke ones was observed in all representatives of the Japanese "four") and as a flagship in the line of cross bikes.

In the first year, the model received quite a lot of criticism from experts who, along with the excellent engine, noted the poor configuration of the suspensions and the geometry of the motorcycle itself. In addition, the 4-speed gearbox caused a lot of confusion, which, by the way, Kawasaki replaced with a 5-speed gearbox by the next (2007) year.

In 2009, the Kawasaki KX450F undergoes restyling, the main innovations of which were the use of an injector. The engine increased the compression ratio, and the fuel tank capacity was slightly reduced: 7.2 → 7.0 liters.

The next major change to the model came in 2012. The motorcycle received a new frame, new engine settings, a slightly reduced front wheel width (90 / 100-21 → 80 / 100-21), a reduced fuel tank (7.0 → 6.2 L) and a Launch Control Mode ).

For 2016, the Kawasaki KX450F is redesigned with an updated look, new engine and chassis settings, a new Showa SFF-Air front fork and a new front brake disc (new shape, increased size: 250 → 270 mm).

In 2019, Kawasaki introduced a completely new generation of the model, which now does not have the letter F in its name - the KX450. In addition to the exterior, the model received a new fork, a new rear shock absorber, a hydraulic clutch, an electric starter, new engine and injector settings (increased throttle diameter).

The "younger" brother of the model is Kawasaki KX250F.

Main competitors:

• Honda CRF450R
• KTM 450 EXC-F
• Suzuki RM-Z450
• Yamaha YZ450F

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Specifications

Specifications Kawasaki KX450F:

Model	Kawasaki KX450F
Motorcycle type	cross
Release year	2006+
Frame	aluminum half duplex
Engine type	1-cylinder, 4-stroke
Working volume	449 cm³
Bore / Stroke	96.0 x 62.1 mm
Compression ratio	12.0: 1 - KX450-D 12.5: 1 - KX250E-F, KX450-J 12.8: 1 - KX450-H
Cooling	liquid
Number of valves per cylinder	DOHC, 4 valves
Fuel supply system	Carburetor, 1x Keihin FCR40 - KX450-D DFI (Digital Fuel Injection) Injector, 1x Keihin 43mm - KX450E-H Injector, 1x 44 mm - KX450-J
Ignition type	AC-CDI - KX450-D DC-CDI - KX450-E +
Maximum power	52.6 hp (38.7 kW) @ 9500 rpm - KX450-J (on wheel) Launch Control Mode - KX450-F +
Maximum torque	44.5 Nm (4.5 kg * m) @ 6700 rpm - KX450-J (on wheel)
Gearbox	4-speed - KX450D6F 5-speed - KX450D7F +
Drive type	chain
Front tire size	90 / 100-21 57M - KX450D-E 80 / 100-21 51M - KX450-F +
Rear tire size	120 / 80-19 63M
Front brakes	1 disc, 250mm, 2-piston caliper - KX450D-F Single disc, 270 mm, 2-piston caliper - KX450-H +
Rear brakes	1 disc, 240 mm, 1-piston caliper - KX450D-H 1 disc, 250 mm, 1-piston caliper - KX450-J
Front suspension	48mm KYB Inverted Fork (Fully Adjustable), 315mm Travel - KX450D-F Showa SFF-Air Inverted Fork (Fully Adjustable) - 310mm travel - KX450-H 49mm Showa Inverted Fork (Fully Adjustable), 305mm Travel - KX450-J
Rear suspension	linkage Progressive Uni-Trak with Monoshock (Fully Adjustable), 315mm Stroke - KX450D-H linkage Progressive Uni-Trak with monoshock (fully adjustable), stroke - 307 mm - KX450-J
Motorcycle length	2185 mm - KX450D-E, KX450-J 2180 mm - KX450-F 2195 mm - KX450-H
Motorcycle width	820 mm - KX450D-H 830 mm - KX450-J
Motorcycle height	1280 mm - KX450D-E 1275 mm - KX450-F, KX450-J 1290 mm - KX450-H
Wheelbase	1485 mm - KX450-D, KX450-J 1480 mm - KX450E-F 1495 mm - KX450-H
Saddle height	965 mm - KX450-D, KX450E9F-EAF 960 mm - KX450EBF, KX450-H 955 mm - KX450-F, KX450-J
Minimum ground clearance	345 mm - KX450-D, KX450-H 340 mm - KX450E9F-EAF, KX450-J 335 mm - KX450EBF 330 mm - KX450-F
Acceleration to 100 km / h
Maximum speed
Fuel tank capacity	7.2 L - KX450-D 7.0 L - KX450-E 6.2 L - KX450-F, KX450-J 6.3 L - KX450-H
Motorcycle weight (dry)	99.8 kg - KX450-D
Motorcycle weight (curb)	112.1 kg - KX450E9F 113.6 kg - KX450EAF 113.4 kg - KX450EBF 113.0 kg - KX450FC 112.5 kg - KX450FD + 108.7 kg - KX450-H 110.0 kg - KX450-J

Documentation

• Kawasaki KX450F