side of things. Personally, I wasn't sold on the TPI
system, always felt too rich or clogged up to me.
The new EFI system found in the SX range takes
a different approach. It's very similar to the common
EFI systems found in the modern four-strokes. The
electronic 39mm throttle body is equipped with in-
jectors and works with the electronic power-valve to
eliminate the need for carburetors and jetting. There
are two handlebar-mounted map switches, just like
the SX-F models, and riders can pick between a
standard or more aggressive power curve. This map
switch is common for old factory two-strokes or
those who opt for a full ignition kit, but this is now a
standard option on the stock KTMs. And just like the
modern four-strokes, the maps on the two-strokes
can be fully tuned if needed. All the SX two-strokes
are outfitted with electric start, too.
Aside from the obvious cool factor of the new
engines, all the two-strokes sport an updated look
that's right on par with their four-stroke brethren.
The 250 and 300cc models share a frame while
the smaller 125cc needed a specific frame to ac-
QUICKSPIN I 2023 KTM 125, 250, 300 SX
P104
Like the previous KTM four-
strokes, the two-strokes
now offer a map switch on
the handlebar. There are
two map options.
