CAUSEWAY YAMAHA

        

OFF-ROAD RIDING’S ANSWER TO MSG

If you ride for the taste, then consider this the flavour enhancer of your dirt biking experience. There’s nothing like the full-blooded, red-meat-and-three-veg thrust of a big-bore rooster like the WR450F to get that adrenalin pumping.

The second thing you’ll notice about riding the WR450F (the first being a slight blurring in the periphery of your vision), is just how tractable and controllable our engineers have managed to make a big horsepower dirt bike.

The WR450F’s rock-solid reliable, five-titanium-valved engine is nestled in a YZ-bred aluminium frame carefully engineered from castings, forgings and extrusions, that provides just the right amounts of both flexibility and rigidity where it’s needed.

Fast, forgiving, fat free… and deliciously fast.

With 449cc of liquid-cooled DOHC four-stroke and five titanium valves delivering broader power than ever, high over-rev capacity and crisp, linear throttle response, there’s not much that can stand in your way. Special camshafts, carburation, intake ports and exhaust all work together to produce an engine with mind-boggling low- and midrange power and a bullet-proof reputation.

♦   YZ-inspired aluminium frame helps reduce weight while optimising mass centralisation. An extensively tested assembly of aluminium forgings, castings and extrusions, the WR frame retains legendary Yamaha handling and response.
♦   No tools” airbox uses a hinge-type quick-open lid to speed air cleaner servicing during your work period - where every second counts. Battery is mounted low to play its part in the WR’s excellent centre of gravity and high manoeuvrability.
♦   As per the ’08 YZs, lightweight screws have been adopted for the front brake attachment assembly to further reduce weight. Every little bit helps.
♦   Wave-type brake discs reduce unsprung weight and provide excellent performance. Front and rear calipers with aluminium pistons deliver strong stopping power with progressive feel.
♦   Dry-sump lubrication system carries the oil reservoir inside the engine cases, for lower overall engine height, excellent mass centralisation and simplified plumbing.
♦   39mm Keihin FCR flat-slide carburettor with throttle position sensor (TPS) produces ultra-precise fuel/air mixing and lightning-quick throttle response. Push button electric starting (and restarting) is backed up with kickstarter.
♦   Digital CDI ignition system delivers more precise spark and monitors engine speed to ensure optimal timing for fast, strong response during hard acceleration.
♦   Large-capacity radiators with reinforcements ensure maximum cooling efficiency with great strength.
♦   Wide-ratio five-speed transmission uses strengthened gears and YZ450F-spec multiplate clutch — good for quick-hitting power in the bush as well as eye-watering top-end power.
♦   Lightweight exhaust system maximises engine power and facilitates hassle-free replacement of oil filter.
♦   Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play.
♦   Fully adjustable air-/oil-separate 48mm cartridge-type fork delivers precise, fade-free handling; fork protectors provide excellent tube protection. Front wheel collar makes front wheel removal quick and easy.
♦   Tapered swingarm adopts YZ-style linkage for compliant rear suspension action from a rebound, spring preload and high- and low-speed compression damping adjustable Kayaba shock.
♦   ProTaper aluminium handlebar in forged triple clamp for light weight and great comfort.

SPECIFICATIONS
ENGINE/IGNITION/TRANSMISSION
Type	Liquid cooled, 4-stroke, DOHC, 5-valve
Displacement - (cc)	449
Bore Stroke - (mm)	95.0 x 63.4
Compression	12.3:1
Lubrication	Dry sump
Fuel Management	FCR MX39
Ignition	CDI
Starter	Electric & Kick
Fueltank - (L)	8
Oil Capacity - (L)	1.2
Transmission	Constant mesh 5-speed
Final Transmission	Chain drive
CHASSIS
Length - (mm)	2190
Width - (mm)	825
Height - (mm)	1300
Seat Height - (mm)	990
Wheelbase - (mm)	1485
Clearance - (mm)	370
Dry Weight - (kg)	112
FRONT END
Suspension Front	Telescopic fork
Tyres Front	90/90-21 54R
Brakes Front	Single disc
REAR END
Suspension Rear	Swingarm
Tyres Rear	130/90-18 69R
Brakes Rear	Single disc