- 2006 YZ250

Feb. 01, 2006 By ORC STAFF
August 2005
New 2006 Yamaha Dirt Bikes

2006 YZ250

by: Rick Sieman
edited by: William Perry

Source Material: Yamaha Motor Corp, USA

Trick Components and Classic Colors
Key Features:
  • A light, aluminum frame housing a patented YPVS™ power-valve-equipped engine results in an awesome power-to-weight ratio.
  • Ready to race out of the crate, complete with a Renthal aluminum handlebar, titanium footpegs, gripper seat and Excel rims
New for 2006:
  • Speed sensitive system, 48mm Kayaba fork tubes move the TCV (transfer control valves) above the fork springs, so that damping force is now controlled by piston speed. Along with a bigger base valve hole, the result is a smooth ride and super-precise handling.
  • A thicker rear shock rod, a super-light titanium shock spring, reduced-friction Kashima coating of internals and a revised swingarm all work together for rear wheel control and ride.
  • Carburetion revisions and a new exhaust pipe meet FIM requirements and produce broadband power.
  • Light and strong Renthal aluminum handlebar in new clamps with 10mm of adjustability.
  • Aggressive new front fender and front number plate up the style factor.
  • Tapered rear wheel spacers ease sliding the rear wheel into place, for quicker tire changes.
  • Liquid-cooled, 249cc, 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 top end.
  • Special-design carbon fiber reed-valve petals improve throttle response and engine performance across the entire RPM range.
  • Smooth-shifting, 5-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 CD 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.
  • An aluminum frame and swingarm produce big weight savings, giving YZ250 the best handling in the 250 class.
  • 48mm fork with TCV (transfer control valve) for stable damping, improved mid- to full-stroke performance and great rider feedback.
  • Removable aluminum rear subframe constructed of square-section pipe for reduced weight.
  • Rear, fully adjustable Kayaba shock with 12.4 inches of travel, separate adjusters for high- and low-speed compression damping, and a full lock oil rebound system for increased comfort.
  • 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.
  • Premium Dunlop D756 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 flat "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.
MSRP* $6,199 (Team Yamaha Blue/White) Available from July 2005
Type 249cc, liquid-cooled, reed valve-inducted, 2-stroke
Bore x Stroke 66.4 x 72mm
Compression Ratio 9.2 – 10.9:1
Carburetion 38mm Keihin PWK w/power jet & throttle position sensor
Ignition Digital CDI
Transmission 5-speed w/multi-plate wet clutch
Final Drive #520 Chain
Suspension/Front 48mm Kayaba inverted telescopic 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 adjusters; 12.4" travel
Brakes/Front 250mm Floating Disc
Brakes/Rear 245mm Disc
Tires/Front 80/100-21-51M Dunlop
Tires/Rear 110/90-19-62M Dunlop
Length 85.7"
Width 32.6"
Height 51.4"
Seat Height 39.1"
Wheelbase 58.3"
Ground Clearance 15.0"
Dry Weight 211 Lbs.
Fuel Capacity 2.1 Gallons
Warranty 30 Day (Limited Factory Warranty)

*Price and specifications subject to change without notice.
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