Triple piston rings and a 21mm diameter piston pin help increase durability and reduce necessary maintenance
Lightweight titanium valves and aluminum valve spring retainers reduce reciprocating weight and boost high-rpm reliability
Asymmetrical high-acceleration cams yield high intake efficiency
Electric starting facilitates quicker stall recovery and lowers rider fatigue
Large-volume airbox contributes to both intake efficiency and sharp engine response. An air duct fashioned from polyethylene resists deformation caused by intake pulses and helps ensure stable engine performance
Advanced engine tuning provides a broad torque curve and an optimized power delivery for quick acceleration without excessive wheelspin
Kawasaki KFX 450 Digital Fuel Injection
32-bit digital fuel injection system with a 42mm throttle body
System measures coolant temperature, air intake temperature, air intake pressure, engine speed and throttle position, then automatically delivers the ideal amount of fuel to optimize power delivery
Crisp engine response is especially advantageous for instant acceleration after landing from jumps
Promotes trouble-free starting – a great benefit in races with engine off starts
Fuel injection allows the use of a lighter throttle return spring, which reduces rider fatigue
Kawasaki KFX 450 Transmission
Five-speed (one-down, four-up) manual transmission locates reverse below first gear
Actuating the reverse-lock release lever when in first gear allows rider to shift “down” into reverse
Compact reverse-lock release lever can be activated with the right thumb, allowing the reverse gear to be engaged while still keeping the front brake lever depressed
The combined weight of the reverse gear system and the lightweight aluminum chassis is no heavier than a steel frame without reverse
Kawasaki KFX 450 Chassis
Highly rigid frame contributes to the KFX’s excellent handling and traction
The aluminum frame’s high torsional rigidity enhances stability in corners and allows the suspension to be easily set up to suit course conditions
Designed for high corner speeds, the KFX450R sits low to the ground, helping to reduce weight transfer
Mounting the battery and coolant tank ahead of the engine lowers the center of gravity, and helps weight the front wheels for increased traction
Single box-tube lower frame contains the front A-arm attachment points. This narrower design enables the use of longer lower A-arms
Kawasaki KFX 450 Suspension
Dual-rate front springs deliver progressive suspension travel for excellent rough-terrain handling
Extra-long lower front A-arms minimize camber variations through the suspension stroke, maximize front wheel traction and boost stability
Rear shock features both low- and high-speed compression adjustability and adjustable rebound damping
The curved lines and rounded edges of the cast aluminum rear swingarm help disperse stress, which along with its varied wall thicknesses equal a design that is both light and strong
The swingarm’s high torsional rigidity contributes to excellent rear wheel traction
The rear axle is tapered for less unsprung weight
Kawasaki KFX 450 Brakes
Dual front hydraulic disc brakes offer strong, consistent stopping performance
Petal-type rear brake rotors reduce unsprung weight and help clean the brake pads for more efficient braking performance
Integrated rear parking brake is designed to be easily engaged and released while wearing gloves. When engaged, the parking brake lever also prevents the clutch lever from being actuated
Kawasaki KFX 450 Improved Water Resistance on Wiring Harness
Resin-molded lead branch points
PVC cover over the connectors for regulator and TPS
Longer colgate tube for tail light leads
Kawasaki KFX 450 Additional Features
Two-tone seat features a smooth top surface for excellent rider mobility and slip-resistant sides for good grip when hanging off in corners
Seat, tank and side covers are shaped to allow excellent rider mobility and to provide support when hanging off in corners
Reinforced mounting on rear side of fuel tank
Tapered Renthal® Fatbar offers both strength and light weight
Handlebar mount is designed to accommodate other MX-type handlebars, enabling riders to select from numerous after-market styles
Specially designed rear wheels feature reinforcing plates for the rims. Located on the axle side of the rims, these plates reinforce the rims where strength is most needed while minimizing weight
Wide front bumper can be gripped with two hands to push/pull the ATV
Two-piece “lapped” front and rear fenders can be replaced separately in the event they are damaged
Detachable front headlight assembly can easily be removed for racing
Optional kick-start system is available for MX-style (GNC) races where light weight is a priority
