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449 cc liquid-cooled, four-stroke single with titanium valves |
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Revised engine tuning provides stronger low-through mid-rpm performance, with the same championship winning top-end rush |
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High-acceleration cams with revised timing help the engine rev more quickly |
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Camshaft lobes and tappets feature a soft-nitride surface treatment for long wear and high-rpm reliability |
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Hand-finished surfaces of the polished intake ports improve intake efficiency at all rpm |
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Lightweight titanium 36 mm intake and 31 mm exhaust valves and aluminum valve retainers reduce reciprocating weight for reliable valve control at high rpm |
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Double valve springs help ensure stable valve operation |
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Screw-type automatic cam chain tensioner with oil pressure spring |
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Revised ignition timing helps boost power |
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Low-friction coating on piston skirt |
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Crankshaft, rotor mass centralization, oil circulation, and ignition timing have been carefully examined to help ensure ideal engine braking characteristics |
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Crankshaft and connecting rod are sintered for additional rigidity |
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Features highly reliable auto-decompression system; the dual-weight centrifugal decompression system fitted to the exhaust cam eases starting, and its simple construction helps to ensure reliability |
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Hot start system gives quick starts when the engine is hot, and the hot start lever is unitized with the clutch lever |
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Larger 41 mm titanium exhaust header for increased power |
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Tapered exhaust pipe joint helps increase ultra-low rpm power. |
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Titanium exhaust pipe heat shield |
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Silencer uses long-fiber packing for lower maintenance |
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High-capacity Denso radiators deliver superior cooling efficiency |
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Slim radiators feature tightly packed cores and fins designed to enhanced heat dispersion |
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New 5-speed transmission offers better choices for dealing with tough rhythm and tight technical track sections |
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New ball bearing shift lever for smoother shifting |
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Revised ratchet-type shift mechanism for smoother shifting and a more positive feel |
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Frame is wider at the rider’s ankles, for better grip and narrower around the seat for a slim riding position and enhanced maneuverability |
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Modifications to the main frame spars reduce torsional rigidity for quicker turning and lighter steering |
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All-aluminum perimeter frame is a composite structure comprising forged, extruded and cast components |
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The slim profile of the KX450F frame, two-piece radiator shrouds that leave the upper frame spars exposed, and careful design of the remaining bodywork make the KX450F feel light and narrow beneath the rider |
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Aluminum skid plate |
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New ultra-smooth DLC (Diamond Like Carbon) coating on the fork sliders reduces stiction for better suspension action |
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Kayaba AOS (Air-Oil-Separate) fork keeps oil and air in separate chambers for stable damping performance during long motos |
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Larger front fork damper cartridges with revised valving for a more progressive and plush action |
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Revised fork seals and Inner liners to complement the new DLC coated sliders and reduce stiction |
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UNI-TRAK® rear suspension system features revised shock valving to maximize traction for better acceleration and enhanced controllability |
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Revised high speed compression valving in the rear shock provides smoother action in the initial part of the stroke but offers firmer damping rates near full compression |
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Alloy swingarm uses cast front section, tapered hydroformed spars and forged chain pullers; the tapered spars are shaped to match the balance of flex and rigidity required of the aluminum frame. |
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New sprocket style chain roller reduces drive lash |
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Front and rear petal disc brakes help reduce unsprung weight |
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Disc shape helps clean the brake pads for more efficient braking performance |
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32-spoke rear wheel for reduced unsprung weight |
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Lighter and stronger rear hub for increased durability and less unsprung weight |
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Renthal aluminum handlebars are standard |
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Lightweight short-length grips feature a special pattern to reduce vibration transmitted from the bars to the rider |
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Revised front brake master cylinder hose joint allows more lever position adjustment |
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Seat uses a slip-resistant top surface for good grip when seated and smooth sides for excellent rider mobility |
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Aluminum parts used instead of steel, including clutch cable elbow, clutch cable fitting nuts, fuel tank fitting nuts, seat mounting brackets, front brake hose clamp and igniter stay bracket |
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New graphics and seat cover have aggressive style that emulates Kawasaki’s race bikes |
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Number plates now feature graphical highlights for a bolder appearance |
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New colored surface treatment on wheel hubs and engine covers |
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Front Suspension: 22-position compression and 20-position rebound dampening adjustment |
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Rear Suspension: 22-position low-speed and variable high-speed compression dampening, 22-position rebound dampening and fully adjustable spring preload |
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Specs, Quotes, Overview
Standard Features