Model Name:WR450F

Manufacturer:YAMAHA

Model Year:2012

Yamaha had announced a limited make-to-order sales of the Japan-spec version “WR450F”, a motorcycle for enduro races, from June 30, 2012. W450F had mounted a 450cc water-cooled 4-stroke DOHC 5-valve FI engine on its aluminum frame. It was a motorcycle that demonstrated excellent rotationality, running performance, and easy set-up characteristics.

This “WR450F” was developed based on its concept, “The Real Enduro Racer, Best in tight trail riding!” It was a bike made to have “easy handling engine characteristics”, “quick rotaionality”, and “easy set-up characteristics”. It consolidated its high-level travelling ability in its innovative appearance. It also came with a portable “Power Tuner” that didn’t require a personal computer, and the rider could enjoy the set-up of the FI wherever he liked.
[Main Characteristics]
(1) Water-cooled DOHC 5-valve 450cc engine
It adopted a primary balancer to draw out low vibration and easy handling. It matched it with the high rigid con-rod, high rigid piston, or its crank inertia mass to draw out the excellent power feeling of a large engine displacement volume.
(2) FI with “Power Tuner”
In order to draw out excellent performance even on enduro courses whose condition could change every second, FI has been adopted for the fuel supply system. With the attached “Power Tuner”, the rider could adjust the fuel injection amount map and the injection timing easily.
(3) Aluminum Frame
It adopted the aluminum Bilateral Beam frame.
(4) The Same Front Suspension as YZ250F/450F
It adopted the same front suspension as the MY2012 YZ250F/450F. Features like the damping characteristics were set up in an optimum condition.
(5) Exclusive Seat & Fuel Tank
The seat was developed to make the long-distance drive comfortable. It supported smooth weight shift by elaborating the design of the seat and the tank.

Specifications:

[Basic spec]

Manufacturer	YAMAHA	Engine Type	Water-Cooled 4 Stroke Single Cylinder DOHC 5-Valve
Model Name	WR450F	Starter	Combined Usage of Cell and Kick Starter
Grade	–	Maximum Output (ps)	–
Drive Train	–	Maximum Torque (kgf/m)	–
Model Type	–	Curb Weight	124
Displacement	449	Dry Weight	113(Approximate Value)
Sales Launch Year	2012/6	Fuel Efficiency by Catalog	–
Height/Width/Length	1275/-/2160	Fuel Tank Capacity	7.5
Seat Height	960	Distance to Empty	–
Front Tire Indication	80/100-21 51M WT	Fuel Supply	Injection
Rear Tire Indication	120/90-18 65M WT

[Service data]

Standard Plug	–	Chain Size	520
Number of Used Plugs	–	Chain Link Number	114
Engine Oil Amount	1.2	Battery Code	–
Engine Oil (Refill)	–	Headlight	–
Engine Oil (Element Replacement)	–	Headlight Type	–
Front Blinker Rating	–	Headlight Remarks	–
Drive Sprocket Teeth Number	13	Tail Light Rating	–
Driven Sprocket Teeth Number	50	Rear Blinker Rating	–

[Machine detail]

Motor Model Code	J333E	Caster Angle	27.0 Degrees
Bore (mm)	95	Trail (mm)	117
Storke (mm)	63.4	Minimum Ground Clearance	–
Compression Ratio	12.3	Distance Between Axes	–
Ignition Method	TCI (Transistor Type)	Streering Angle (Right)	–
Engine Lubrication Type	Compulsory Force Feeding Wet Sump	Turning Angle (Left)	–
Frame Type	Semi Double Cradle	Mirror Screw Hole Diameter	–
Minimum Rotaion Radius	–	Fuel Tank Reserve Capacity	–

[Underbody detail]

Front Brake Type	Hydraulic Single Disc	Suspension Type (Rear)	Swing Arm （Link Type)
Front Brake Remarks	–	Number of Rear Shock Absorbers	–
Rear Brake Type	Hydraulic Single Disc	Rear Suspension Stroke	–
Rear Brake Remarks	–	Rear Wheel Travel	–
Suspension Type (Front)	Telescopic	ABS	–
Front Fork Type	–	Drive Train	–
Front Suspension Stroke	–	Differential Oil Amount	–
Front Fork Diameter	–	Chain Remarks	–

[Equipment]

Seat Lowering Allowance	–	Theft Prevention Device	–
Mirror Screw Hole Diameter	–	Tail Light Bulb Type	–
Mirror Remarks	–	Tail Light Base Shape	–
Electronic Device Remarks	–	Tail Light Base Shape 2	–
Fuel Gauge	–	Tail Light Remarks	–
Clock	–	Front Blinker Bulb Type	–
Hazard	–	Front Blinker Base Shape	–

[Engine detail]

Clutch Type	Wet Multiple Plate	Tappet Clearance (mm) EX	–
Transmission	Permanently Engaged 5-Stage Normal Shift	Idling Initial Value (rpm)	–
Number of Gears	5	Needle Steps (Clip Location)	–
Gear Ratio	2.417 / 1.733 / 1.313 / 1.050 / 0.840	Float Level (mm)	–
Primary Reduction Ratio	2.652	Air Screw Return	–
Secondary Reduction Ratio	3.846	Main Jet Type	–
Variable Speed Vehicle Gear Ratio	–	Main Jet Number	–
Tappet Clearance (mm) IN	–

[Other spec]

Clutch Cable Length	–	Rear Brake Cable Length	–
Choke Cable Length	–	Other Cables	–
Meter Cable Length	–	Engine Number (Production Launch)	–
Throttle Cable Length	–	Engine Number (Production End)	–
Front Brake Cable Length	–

[See Moto Index of YAMAHA]
[See Accessories for YAMAHA WR450]