2007 Yamaha YZ125

New 2007 Yamaha Dirt Bikes

Sep. 01, 2006 By ORC STAFF
New Features and Refinements
2007 Yamaha YZ125
 Key Features:
  • A light, aluminum frame housing a light and compact engine results in an awesome power-to-weight ratio.
  • Ready to race out of the crate, complete with a ProTaper aluminum handlebar, titanium footpegs and gripper seat.
 New for 2007:
  • Modifying the 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 clamps adds comfort and control.
  • Revisions to the ignition map and silencer boost low-end and mid-range performance.
  • Platinum spark plug is super-durable and puts out fat sparks.
  • Use of lighter, box-head bolts throughout the chassis eases maintenance while reducing weight for increased performance.

  • Amazingly compact 124cc reed valve-inducted two-stroke super light, with highly efficient straight intake and exhaust tracts.
  • Patented YPVS™ power-valve system combines crisp, hard-hitting bottom-end acceleration with strong mid-range and eye-opening top end.
  • 38mm Mikuni TMX carburetor gives excellent throttle response and serious horsepower.
  • Six-speed close-ratio transmission optimizes gear ratios for maximum performance.
  • Digital CDI ignition system delivers precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration.
  • Large-capacity radiator features a 10-row core with four louvers to deliver maximum cooling efficiency at all performance levels.
  • Primary kickstarting ensures easy restarts in any gear.
  • Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
  • 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 is 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 floating front and 245mm rear discs, deliver strong stopping power with progressive feel.
  • Lightweight 21-inch front and 19-inch rear 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:
  • Special-design “gripper” type seat and fuel tank, forward-canted steering crown and low ProTaper handlebar all help create greater freedom of movement and more comfortable ergonomics for riders.
  • Wide, cleated, folding titanium footpegs are lightweight and provide excellent comfort, grip and ground clearance.
  • Wide-diameter fuel tank cap for easier 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 YZ125
Engine Type 124cc, liquid-cooled, 2-stroke, reed valve
Bore and Stroke 54 x 54.5mm
Compression Ratio 8.6~10.7:1
Carburetion TMX x 38
Fuel System MikuniTM VM12
Ignition CDI
Transmission Constant mesh 6-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 110/90-19-57M
Overall Length 84.1"
Overall Width 32.6"
Overall Height 51.8"
Seat Height 39.3"
Ground Clearance 15.2"
Wheelbase 56.8"
Dry Weight 190 lb
Fuel Capacity 2.1 gal.
Other Main Jet #410
Main Air Jet 2.5
Jet Needle 6BFY42-74-3
Needle Jet S-1
Pilot Air Jet 1 #40
Pilot Outlet 0.7
Pilot Jet 40
Primary Reduction Ratio 64/19 (3.368)
Secondary Reduction Ratio 48/13 (3.692)
Gear Ratio - 1st Gear 31/13 (2.385)
Gear Ratio - 2nd Gear 29/15 (1.933)
Gear Ratio - 3rd Gear 27/17 (1.588)
Gear Ratio - 4th Gear 23/17 (1.353)
Gear Ratio - 5th Gear 24/20 (1.200)
Gear Ratio - 6th Gear 23/21 (1.095)
Warranty 30 Day (Limited Factory Warranty)
MSRP*$5,499 (Team Yamaha Blue/White) Available from July 2006

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