2004 YZ250F Specifications


MSRP
$5,599
Engine
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 5-speed w/multi-plate wet clutch
Final Drive #520 Chain
Chassis
Suspension/Front 48mm Kayaba inverted cartridge fork w/adjustable compression and rebound damping; 11.8" travel
Suspension/Rear Kayaba single shock w/adjustable preload, compression and rebound damping & separate hi/lo-speed compression adjuster; 12.4" travel
Brakes/Front 250mm Floating Disc
Brakes/Rear 245mm Disc
Tires/Front 80/100-21 Dunlop
Tires/Rear 100/90-19 Dunlop
Dimensions
Length 85.1"
Width 32.6"
Height 51.3"
Seat Height 39.2"
Wheelbase 58.0"
Ground Clearance 15.0"
Rake (Caster Angle) 27.1
Trail 4.6"
Dry Weight 208 Lbs.
Fuel Capacity 1.8 Gallons
Other
Main Jet #178
Main Air Jet #200
Jet Needle 0BELP-4
Needle Jet 2.9mm (I.D.)
Pilot Air Jet 1 #100
Pilot Outlet 0.9
Pilot Jet #40
Primary Reduction Ratio 57/17 (3.353)
Secondary Reduction Ratio 48/13 (3.692)
Gear Ratio - 1st Gear 57/17 (3.353)
Gear Ratio - 2nd Gear 28/16 (1.750)
Gear Ratio - 3rd Gear 29/20 (1.450)
Gear Ratio - 4th Gear 27/22 (1.227)
Gear Ratio - 5th Gear 25/24 (1.042)
Gear Ratio - 6th Gear Not Applicable
Color Team Yamaha Blue/White


2004 YZ250 Features & Benefits

New for 2004:
  • All-new, lightweight 48mm inverted Kayaba cartridge fork features 11.8" of travel with compression and rebound damping adjustability. Special coating on fork reduces stiction while giving “factory” appearance.
  • Lightweight front and rear calipers with aluminum pistons and revised front master cylinder combined with 250mm fully floating front and 245mm rear disc deliver strong stopping power with progressive control and feel.
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  • All-new, upper triple clamps feature an anodized finish for “factory” look.
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  • All-new, “gripper-style” seat cover offers excellent feel and control.
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  • All-new, wide, cleated, folding titanium footpegs are lightweight and provide excellent comfort, grip and ground clearance.
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    Engine:
  • Liquid-cooled, 249cc, reed valve-inducted, 2-stroke engine is lightweight, compact and features an incredibly wide, hard-hitting powerband.
  • Patented YPVS power valve system features special valve end collar and extra plate added to the back of the torsion spring, delivering airtight sealing for crisper low-end performance.
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  • Special-design carbon fiber reed-valve petals improve throttle response and engine performance across the entire RPM range.
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  • Smooth-shifting, 5-speed, close-ratio transmission with heavy-duty, multi-plate clutch.
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  • Primary kickstarter ensures smooth, easy starting action and reduced weight.
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  • Large-capacity radiator features a 10-row core with 4 louvers to deliver maximum cooling efficiency at all performance levels.
  • Exhaust pipe with specially designed silencer features a tapered section for broader power delivery with stronger low-end hit and maximum corner-exiting muscle.
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  • 38mm Keihin PWK carburetor with power jet and throttle position sensor (TPS) ensure precise fuel/air mixing and extra-crisp throttle response throughout the powerband.
  • Digital CD ignition system delivers precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration.
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  • Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
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    Chassis/Suspension:
  • High-tension steel, twin-spar frame is light with great lateral rigidity by way of a strong main pipe and thinner-walled cross-pipe.
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  • Removable aluminum rear subframe constructed of square-section pipe for reduced weight.
  • 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.
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  • Lightweight 21" front and 19" rear Excel rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance and handling.
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  • Premium Dunlop 739 knobbies offer race-spec traction and excellent wear.
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    Additional Features:
  • Special-design flat “gripper” type seat and fuel tank, forward-canted steering crown and low handlebar all help create greater freedom of movement and more comfortable ergonomics for riders.
  • Wide-diameter fuel tank cap ensures easier usage, while larger tank opening means faster, hassle-free refueling.
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  • Cleated rear brake lever and folding shift lever tip offer superb grip and exceptional durability.
  • Repackable exhaust silencer.
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  • Durable, comfortable handlebar grips.
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  • Stainless steel clutch cable for longer life.
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