2007 Yamaha YZ250

New 2007 Yamaha Dirt Bikes

Sep. 01, 2006 By ORC STAFF
New Features and Refinements
2007 Yamaha YZ250
 Key Features:
  • Our legendary two-stroke Supercross winner is more potent than ever.
  • Winner of "Cycle World", "Racer X" and "Motocross Action" shootouts.
  • A light, aluminum frame housing a patented YPVS™ power-valve-equipped ripper of an engine results in an awesome power-to-weight ratio.
  • Ready to race out of the crate, complete with new ProTaper aluminum handlebar, titanium footpegs, gripper seat and Excel rims
 New for 2007:
  • Modifying thickness of both inner and outer fork tubes and revising damping settings provides fantastic bump absorption and comfort while shaving weight.
  • Lightening the rear shock with aluminum components takes off more weight, and revised settings complement the ones in the fork.
  • A light and strong ProTaper aluminum handlebar in adjustable mounts adds comfort and control.
  • A new jet needle in the 38mm Keihin PWK carburetor boosts bottom-end and mid-range response.
  • Use of lighter, box-head bolts throughout the chassis eases maintenance while reducing weight and increasing performance.
  • 249cc liquid-cooled, reed valve-inducted two-stroke engine is lightweight, compact and features an incredibly wide, hard-hitting powerband.
  • Patented YPVS power valve system combines crisp, hard-hitting bottom-end acceleration with strong midrange and eye-opening top-end.
  • Special-design carbon fiber reed-valve pedals improve throttle response and engine performance across the entire rpm range.
  • Smooth-shifting, five-speed, close-ratio transmission with heavy-duty, multiplate clutch.
  • Primary kickstarter ensures smooth, easy starting action and reduced weight.
  • Large-capacity radiator features a ten-row core with four louvers for maximum cooling efficiency.
  • 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 CDI ignition system delivers precise spark for faster, stronger response anywhere in the powerband.
  • Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
  • A carefully engineered, advanced aluminum frame and swingarm give the YZ250 the best handling in the 250 class.
  • Speed-Sensitive System 48mm Kayaba fork tubes move the transfer control valves (TCV) above the fork springs, so that damping force is controlled by piston speed instead of position. Along with a bigger base valve hole, the result is a smooth ride and super-precise handling.
  • Removable aluminum rear subframe constructed of square-section tubing for reduced weight.
  • Rear, fully adjustable Kayaba shock features a super-light titanium shock spring and reduced-friction Kashima coating of internals. 12.4 inches of travel, separate adjusters for high- and low-speed compression damping, and a full lock oil rebound system for increased comfort all add up to fantastic rear wheel control and a sweet ride.
  • Lightweight front and rear calipers with aluminum pistons and anti-bubble front master cylinder, 250mm fully floating front and 245mm rear discs, deliver strong stopping power with progressive feel.
  • Lightweight 21-inch front and 19-inch rear Excel rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance and handling.
  • Tapered rear wheel spacers ease sliding the rear wheel into place, for quicker tire changes.
  • Premium Dunlop knobbies offer race-spec traction and wear.

 Additional Features:
  • Wide, cleated, folding titanium footpegs are lightweight and provide excellent comfort, grip and ground clearance.
  • Special-design “gripper” type seat and fuel tank, forward-canted steering crown and low handlebar provide excellent movement and more comfortable ergonomics for riders.
  • Wide-diameter fuel tank cap ensures easier usage, while larger tank opening means faster, hassle-free refueling.
  • Cleated rear brake lever and folding shift lever tip offer superb grip and exceptional durability.
  • Repackable exhaust silencer.
  • Durable, comfortable handlebar grips.
  • Stainless steel clutch cable for longer life.
2007 YZ250
Engine Type 249cc, liquid-cooled 2-stroke reed valve
Bore and Stroke 66.4 x 72mm
Compression Ratio 9.2 – 10.9:1
Carburetion PWK38S X
Fuel System MikuniTM VM12
Ignition CDI
Transmission Constant mesh 5-speed/Wet, multiple-disc coil spring
Final Drive Chain Drive
Front Suspension Telescopic Fork, coil spring/oil damper, 11.8" Travel
Rear Suspension Swingarm (link, suspension), coil spring/gas-oil damper, 12.4" Travel
Front Brake Hydraulic single disc brake, 250mm
Rear Brake Hydraulic single disc brake, 245mm
Front Tire 80/100-21-51M
Rear Tire 110/90-19-62M
Overall Length 85.7"
Overall Width 32.6"
Overall Height 51.4"
Seat Height 39.1"
Ground Clearance 15.0"
Wheelbase 58.3"
Dry Weight 211.6 lb
Fuel Capacity 2.1 gal.
Other Main Jet #178
Main Air Jet #200
Jet Needle N3EW-2
Needle Jet 2.9
Pilot Air Jet 1 #50
Pilot Outlet 0.8
Pilot Jet #50
Primary Reduction Ratio 63/21 (3.000)
Secondary Reduction Ratio 50/14 (3.571)
Gear Ratio - 1st Gear 27/14 (1.929)
Gear Ratio - 2nd Gear 23/15 (1.533)
Gear Ratio - 3rd Gear 23/18 (1.278)
Gear Ratio - 4th Gear 24/22 (1.091)
Gear Ratio - 5th Gear 20/21 (0.952)
Warranty 30 Day (Limited Factory Warranty)

MSRP* $6,299 (Team Yamaha Blue/White) Available from July 2006

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