RIDE REVIEW I 2023 KTM 300 SX
P94
This new system could be called
TBI (Throttle Body Injection), just
like all the modern four-strokes.
With no TPI, owners are again
back to mixing gas. The KTM
techs recommended a smooth
60:1 ratio upon delivery. Along
with the new fuel injection, the
300 also comes with an elec-
tronic powervalve for smoother
power delivery.
So, what's so special about
this bike? Essentially, it's a big-
bore version of KTM's 250 SX,
right? Well, kind of. It's no secret
that people have been building
their own 300cc motocrossers
for some time now. KTM's of-
fered an OEM 300 SX kit in the
past, while others have opted to
body bag a 300 parts bike from
Facebook Marketplace. The
OEM 300cc kit provided a new
cylinder, cylinder head, piston,
ignition, powervalve and gaskets
that were directly swappable
to a standard 250cc SX model.
The new 2023 300cc takes that
hassle of swapping parts off the
table and allows the customer to
walk out of the dealership with
open-class power. Oh yeah, the
fuel injection is cool, too.
We recently loaded up the 300
and took it to Glen Helen for our
first real test ride. We also rode it
this summer during KTM's 2023
model launch at RedBud, but we
only rode it for a few laps, as the
bike was still in its final stages
of development. Glen Helen,
with its wide-open straights and
steep hillclimbs, is our go-to
testing grounds for open-class
power like this.
The first thing I noticed was
the weight. Or lack thereof. At
219 dry pounds (claimed), the
Looking for a two-stroke motocrosser with open-
class power? Here's KTM's new 300 SX.
