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.
 Engine:
  • 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.
 Chassis/Suspension:
  • 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.
SPECIFICATIONS
2007 YZ250
ENGINE
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
DRIVE TRAIN
Transmission Constant mesh 5-speed/Wet, multiple-disc coil spring
Final Drive Chain Drive
CHASSIS / SUSPENSION / BRAKES
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
DIMENSIONS
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
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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