2003 WR250F Information



Presenting the all-new WR250F.
Thoroughly massaged from stem to stern, this quarter-liter carving knife enters the new season with much of the same fine-tuning as its big-bore WR450F brother, starting with invaluably handy...
New for 2003, convenient electric start.

Try it...

In fact, greater ease of use... and precision of performance... shines throughout, with a stronger, lighter-weight frame providing greater lateral rigidity for responsive handling with less flex.

Recalibrated front and rear suspension settings, coupled with a lighter, stiffer swingarm, ensure smoother damping action with more precise wheel control.

And an all-new, lighter-weight rear master cylinder and front and rear disc brake calipers deliver stronger stopping power with greater feel.

The WR250F. Your favorite trails await.

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NEW FOR 2003

  • The industry's most powerful and most advanced 250cc 4-stroke enduro machine returns lighter and better-handling than ever - and featuring all-new, super-easy electric starting!
  • Redesigned airbox features all-new retaining bracket for improved sealing.
  • Larger-capacity radiator and louvers ensures maximum cooling efficiency and minimal horsepower loss.
  • Super-strong twin-spar frame redesigned with reduced weight and greater lateral rigidity for minimal flex and scalpel-sharp handling.
  • All-new tapered swingarm features less weight and greater rigidity for more compliant rear suspension action.
  • Recalibrated front fork settings deliver improved damping force with less bottoming for a smoother, more compliant overall stroke.

  • Rear shock refinements include improved actuation, a new linking ratio and enhanced damping force.
  • Removable aluminum rear subframe constructed of square-section pipe for reduced weight.
  • All-new, lighter-weight front and rear master cylinders and calipers, combined with 250mm fully floating front and 245mm rear disc, delivers stronger stopping power with greater, more progressive control and feel.
  • Retooled steering crown combines with all-new bodywork - flatter seat, fuel tank and radiator shrouds - creates a more aggressive riding position while allowing optimal rider movement.
  • More weight savings come via all-new, two-piece (part aluminum, part plastic) engine protector plates and thinner-walled engine guard construction.
  • All-new automatic decompression system eliminates manual lever, ensuring easy restarts in any gear.
  • All-new hot start system features convenient, handlebar-mounted lever.


  • Liquid-cooled, 249cc, 5-valve, DOHC, 4-stroke with trick, factory team-spec titanium valves produces tremendous, hard-hitting low- and mid-range torque and a broader powerband tuned specially for enduro/off-road performance needs.
  • Lightweight forged piston reduces reciprocal mass and friction for faster revving and greater durability.
  • Stratospherically high, 13,500-rpm redline means incomparable, competition-crushing pulling power.
  • 37mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) ensures ultra-precise fuel/air mixing and lightning-quick throttle response.
  • Digital CD ignition system delivers more precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration.
  • Lightweight exhaust system with specially shaped header angle maximizes engine power and allows hassle-free replacement of oil filter.
  • Aluminum exhaust silencer looks trick and reduces weight.
  • Electric starting and kick starting with integrated hot-start button ensures easy restarts in any gear.
  • Slick-shifting, wide-ratio, 5-speed transmission with heavy-duty, multi-plate clutch geared specially for broad, off-road/enduro power delivery and features an involute spline set-up for smoother shifting, instant hook-up.
  • Dry sump lubrication system uses frame as oil tank, helping to create a more compact engine and chassis for superb handling performance.
  • Magnesium cylinder head cover helps shave weight.
  • Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.


  • Lightweight 46mm inverted Kayaba cartridge fork features 11.8" of travel with compression and rebound damping adjustability.
  • Low-friction outer tubes and aluminum piston rods ensure smooth, compliant fork stroke for superior handling and light steering.
  • Rear suspension system features fully adjustable Kayaba shock with 12.4" of travel and separate adjusters for high- and low-speed compression damping.
  • Lightweight 21" front and 18" rear rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance.
  • Premium Dunlop 739 knobbies offer unbeatable, competition-spec traction and excellent wear.

Additional Features

  • Enduro-legal lighting front and rear increase versatility by maximizing nighttime and low-light visibility.
  • Large, 2.6-gallon fuel tank ensures excellent range.
  • Resettable tripmeter allows rider to keep track of both mileage and fuel reserves.
  • Wide, cleated, folding cast alloy footpegs provide excellent comfort, grip and ground clearance.
  • Cleated rear brake lever and folding shift lever tip offer superb grip and excellent durability.
  • Lightweight aluminum kickstand adds convenience and tucks up high when not in use.
  • Repackable exhaust silencer.
  • Durable, comfortable handlebar grips.
  • Stainless steel clutch cable for longer life


MSRP $5,799* Available from January 2003
Type 249cc, liquid-cooled, 5-valve, DOHC, 4-stroke w/titanium valves
Bore x Stroke 77 x 53.6mm
Compression Ratio 12.5:1
Carburetion 37mm Keihin FCR flat-slide w/throttle position sensor
Ignition Digital CDI
Transmission Wide-ratio, 5-speed w/multi-plate wet clutch
Final Drive #520 Chain
Suspension/Front 46mm Kayaba inverted telescopic fork, 11.8" travel
Suspension/Rear Fully adjustable Kayaba single shock, 12.4" travel; separate hi/lo speed compression adjustment
Brakes/Front 250mm Floating Disc
Brakes/Rear 245mm Disc
Tires/Front 80/100-21 Dunlop
Tires/Rear 100/100-18 Dunlop
Length 85.1"
Width 32.5"
Height 51.2"
Seat Height 39.2"
Wheelbase 58.0"
Ground Clearance 15.0"
Dry Weight N/A
Fuel Capacity 2.6 Gallons
Main Jet N/A
Main Air Jet N/A
Jet Needle N/A
Needle Jet N/A
Pilot Air Jet 1 N/A
Pilot Outlet N/A
Pilot Jet N/A
Primary Reduction Ratio N/A
Secondary Reduction Ratio N/A
Gear Ratio - 1st Gear N/A
Gear Ratio - 2nd Gear N/A
Gear Ratio - 3rd Gear N/A
Gear Ratio - 4th Gear N/A
Gear Ratio - 5th Gear N/A
Color Team Yamaha Blue/White
Warranty 30 Day (Limited Factory Warranty)


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Copyright 2003 ThumperFaq

Last Updated 11/01/2003