Wheelbase
1,270 mm (50.0'')
Seat Height
810 mm (31.9'')
Engine
Liquid cooled, DOHC, 5-valve (titanium), single
Compression Ratio
11.8: 1
Fuel Capacity
10 L (2.2 Imp. gal)
Bore And Stroke
95mm x 63.4mm
Fuel Delivery
Mikuni 42 mm throttle body F.I.
Ignition / Starting
TCI / Electric
Description
Conquer Dirt
The championship streak continues for the YFZ450R. Why? Quite simply it outperforms all others. The race-ready YFZ450 pioneers adrenaline-pumping excitement that only Yamaha can deliver. |
POWER
• 449cc, liquid-cooled, 5-valve (titanium valves), fuel injected single produces championship winning power
• Assist & slipper clutch reduces the effects of engine braking for more precise cornering & improved suspension function, while the assist function reduces lever effort for less arm pump & fatigue |
Suspension
• Fully adjustable KYB piggyback front shocks feature dual rate springs and provide 250 mm (9.8") of wheel travel
• Long "Wide Arc" front A-arm design reduces changes in camber as the suspension travels through its full range of motion for optimum handling & suspension performance.
• Fully adjustable KYB piggyback rear shock is mated to a lightweight aluminum swingarm and provides 280 mm (11") of wheel travel. |
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DESIGN
• Tools-free installation & removal of front & rear fenders for easier cleaning & servicing
• Roomy ergonomics for the active rider or racer, making weight shifting fast & easy
• Tapered handlebars are mounted to 4-way adjustable handlebar clamps providing a total of 30 mm (1.2") of fore - aft adjustability. |
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Features & Benefits
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ENGINE |
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449cc, liquid-cooled, DOHC, 5-valve (titanium), single
- proven reliability & excellent durability
- championship winning torque & horsepower
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Electric starting.
- includes auto decompression system for fast, easy starts
- can be re-started in any gear
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DOHC, 5-valve cylinder head design with 11.8:1 compression ratio.
- 3-intake (27 mm) & 2-exhaust (28 mm) titanium valves provide maximum breathing efficiency
- shim under bucket valve actuation for extended valve adjustment intervals
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Lightweight titanium valves use load-reduced valve springs.
- lightweight titanium reduces reciprocating weight & allows for a higher rpm limit
- titanium valves are 40% lighter than steel valves
- load reduced valve springs reduce frictional losses
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Lightweight, high performance hollow camshafts.
- cam profiles provide excellent torque & horsepower in the mid to high rpm range
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Lightweight, short-skirt, forged aluminum piston.
- lightweight design means faster throttle response
- reduced mechanical vibration for excellent durability
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Lightweight, "liner-less" ceramic composite plated aluminum cylinder.
- no heavy sleeve or liner, plating is sprayed directly on the aluminum block
- ceramic coating insures faster, more uniform heat dissipation
- ceramic coating enhances the thin film of oil between cylinder & piston, reducing friction & increasing power
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Lightweight gear driven engine balancer shaft.
- reduces engine vibration for improved rider comfort & reduced rider fatigue
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Dry sump lubrication system.
- design helps reduce oil-starvation at high g-loads
- no deep oil pan means engine is lower in the chassis for optimum handling & reduced centre of gravity
- replaceable element style oil filter
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42 mm Mikuni throttle body fuel injection system with TPS & ISC.
- 12 hole injector for optimum fuel atomization for maximum power output
- TPS (Throttle Position Sensor) is used to more precisely calculate the fuel injection quantity for optimum power & excellent throttle response at all rpms
- ISC (Idle Speed Control) helps ensure a steady idle even during warm up
- light action throttle lever means less fatigue during long motos.
- other fuel injection benefits include; excellent throttle response, choke-free starting, steady idle during warm-up & reduced emissions
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"No tools required" air box with washable dual stage foam air filter.
- washable foam filter features tool-free access for fast servicing
- dual stage design provides maximum filtering
- no tools required air box drain
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Compact 5-speed manual transmission with reverse.
- optimized gear ratios match engine output for maximum performance
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Compact, slipper clutch with assist.
- reduces effects of engine braking allowing the rider to control corner entry speed more precisely, reducing lap times
- provides optimum control (less rear wheel chatter) & improved suspension performance
- assist function reduces clutch lever effort by up to 20%, improving rider stamina
- quick access outer clutch cover for fast clutch servicing
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O ring chain final drive.
- easy to adjust
- heavy duty O-ring chain offers excellent strength & durability
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High capacity cooling system with electric cooling fan.
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Maintenance-free transistor controlled ignition (TCI).
- produces a strong spark for fast starts
- provides precise ignition timing / mapping for optimum performance at all rpms
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Performance tuned exhaust system with cleanable spark arrestor.
- tuned system for maximum power
- spark arrestor prevents stray sparks from exiting the exhaust
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Air Injection System (AIS) injects fresh air into exhaust ports to fully burn any unburnt fuel, reducing exhaust emissions.
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CHASSIS |
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Lightweight, combination cast aluminum & steel frame with "tuned" rigidity balance.
- unit width is 1,240 mm or 48.8" wide, combining with a low seat height of 810 mm (31.9") for flat, stable handling
- compact design provides nimble, responsive handling
- engine is mounted low in the frame to reduce the centre of gravity & centralize mass for exceptional handling
- rigidity balance maximizes handling & suspension performance. Frame is optimized to provide a balance of strength, rigidity & tuned flex.
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Detachable aluminum rear subframe.
- reduces weight
- allows easier rear shock access
- reduces costs in the event of damage
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Lightweight aluminum swingarm.
- reduces weight
- excellent rear wheel traction & control
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Fully adjustable, independent double wishbone front suspension with premium KYB piggyback shocks.
- fully adjustable, long stroke KYB high pressure nitrogen charged piggyback shocks with dual rate springs & friction reducing Kashima coating
- front shock adjustments include threaded spring preload, high speed compression damping, low speed compression damping & rebound damping
- 250 mm (9.8") of front wheel travel
- allows tailoring of suspension to suit rider weight, riding style & track conditions
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Fully adjustable, single shock link-type rear suspension with premium KYB piggyback shock.
- fully adjustable, long stroke KYB high pressure nitrogen charged piggyback shocks
- rear shock adjustments include threaded spring preload, high speed compression damping, low speed compression damping & rebound damping
- 280 mm (11") of rear wheel travel
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Dual 161 mm front disc brakes squeezed by twin piston calipers.
- pads feature wear indicator grooves for visual pad wear inspection
- excellent braking power, feeling & control
- adjustable front brake lever
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200 mm wave-style rear disc squeezed by twin piston caliper. Parking brake equipped.
- wave design reduces weight & improves cooling (more surface area for better cooling)
- pads feature wear indicator grooves for visual pad wear inspection
- handlebar mounted parking brake lever
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Rugged, lightweight aluminum rims fitted with high performance MAXXIS tires.
- rims feature rolled edges for additional strength & durability
- tire design enhances steering precision, control & traction
- optimized rim offsets enhance handling & stability
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10 litre fuel tank.
- 3.4 litre reserve capacity (low fuel light illuminates)
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Lightweight tapered aluminum handle bar.
- excellent strength & durability
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Adjustable handlebar holders offer a total of 4 different handlebar positions.
- fore & aft adjustment with 30 mm range
- suits wide variety of rider sizes & preferences
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Keyed ignition for additional security
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Compact LED warning indicators.
- front body mounted LED warning indicators for; low fuel, coolant temp, engine trouble & neutral gear position
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Aggressive, race oriented bodywork & special flat seat design.
- race designed bodywork provides freedom of movement, good forward visibility & lots of knee room ... whether sitting or standing
- seamless side shrouds prevent boots from snagging on bodywork
- bodywork panels can be quickly removed for easier servicing & washing
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Rugged composite under engine skid frame protection.
- lightweight design reduces weight
- skid plate allows unit to slide more easily over obstacles
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Dual "cat eye" headlights & LED taillight with brake light.
- dual "cat eye" 30 / 30 watt Krypton bulb headlights
- single brilliant LED taillight with brake light
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Extra wide 65mm (2.6") foot pegs with heel guards provide excellent grip.
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Low maintenance, sealed battery (battery should be charged during extended storage).
- sealed design means no leaks & never having to add distilled water
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