Out on the track, the 250SX delivers quick and fun big power. Luckily,
it delivers it smoothly, coming on right
off the bottom and pulling predictably
into the strong mid until it’s done
revving at around 9000 rpm. The
250SX doesn’t have a big hairball hit
like 250 two-strokes can be known
for—that can be achieved with aftermarket pipes and silencers. With the
stock pipe and muffler, the SX lets a
rider rev it and hammer or short-shift
and lug. With the changes to the air
boot and the VForce reed block with
reed stops, the 2012 doesn’t quite rev
as far as the 2011, but it has a slightly
stronger mid hit. With a few hours on
the engine and well broken in, it
pulled a bit farther, but still not quite
as far as the 2011.
To ride the 250SX to its full potential, you do have to shift more than a
450, but that is life with any two-stroke. You also have to use the
clutch constantly to put the power to
the ground effectively, and that’s why
we love the hydraulic clutch so much.
It always has the same feel at the
lever, no matter how hard you abuse
the clutch. Shifting on the 250SX five-speed transmission is gooey smooth.
The 250SX loves to corner on the
inside or sweep the outside. The
steering is precise without nervousness, and ruts are pure pleasure.
Railing an outside berm or carving an
inside rut is made easy, even if you
aren’t in the right gear, thanks to the
strong power and a quick stab of the
clutch. The light weight of the 250SX
makes it effortless to toss around and
can make last-minute line changes.
When you’re coming hot into corners, the 250SX is amazing at slowing
down in time to grab the inside line.
The front rotor is a 260mm Brembo,
and since it works amazing on a
450cc four-stroke, it is unbelievable
on the 215-pound 250. We came into
corners at speeds that would have
sent us to the hospital on a 450 and
made the inside lines.
2012 KTM 250SX Clearly KTM is making a statement by constantly developing the two- stroke, and it’s refreshing to see that here is still enough demand for the mighty two-stroke. The 2012 KTM 250SX retails for $2000 less than its 450cc four-stroke big brother. In the
sprocket department, we went with
the stock gearing. After 30 hours, the
chain and sprockets, both quality
parts, still look great. We had good
luck with the stock Pirelli mid-soft
tires (the four-strokes come with
Dunlop MX51 tires).
Small, compact, light and potent, the
KTM 250SX engine provides smooth,
controllable power. Working on a two-stroke is simple and quick.
MX TW0-STROKE TEST