For 2012, the Yamaha YZ125 didn’t receive many changes, but it did get
some new graphics and still weighs under
200 pounds without gas—more than 20
pounds less than a 250F.
The front forks are 48mm KYBs with the
Speed-Sensitive System (SSS). With SSS
forks, damping force is controlled by piston speed, which provides a smooth, more
precise ride. The KYB shock uses a light
titanium spring and has Kashima-coated
internals for reduced friction. The stock
suspension on the YZ125 is very good,
good enough for racing.
The 124cc, liquid-cooled, two-stroke
engine puts out about 34 horsepower on
the dyno and drinks through a 38mm
Mikuni TMX carburetor. The power gets
to the rear wheel through a six-speed
transmission. Cradling that tiny engine
is an aluminum frame and swingarm.
Ain’t going to die!
Ryan Orr couldn’t get enough of the
YZ125 and was giggling all day long.