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Features
449cc liquid-cooled, DOHC, four-valve,
four-stroke single
- A lightweight forged piston reduces reciprocating weight
- 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
- Lightweight high-performance titanium exhaust header contributes
to low and mid-range throttle response
- 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
Digital Fuel Injection (DFI)
- 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 reduce rider fatigue
Transmission
- The five-speed (one-down, four-up) manual transmission locates
the reverse gear below first
- Actuating the reverse-lock release lever when in first gear
allows you 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 using a steel frame without
reverse
Aluminum 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 roll tendencies
- 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
Advanced Suspension Design
- 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
Front and Rear Disc 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
Monster Energy Edition
- Special painted black aluminum frame
- Special black wheels
- Molded black Thermo-Plastic Olefin (TPO) bodywork provides
ultra-high gloss appearance and is scratch-resistant
- Special Kawasaki Monster Energy graphics rake lever also prevents
the clutch lever from being actuated
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.
- 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
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