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.
Engine:
- 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.
Chassis/Suspension:
- 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.
| SPECIFICATIONS |
2007 YZ125 |
ENGINE |
| 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 |
DRIVE TRAIN |
| Transmission |
Constant mesh 6-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 |
110/90-19-57M |
|
DIMENSIONS
|
| 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
|
| 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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