350SXF. The key ingredient of
our project bike was the engine
package. Imagine how cool it would
be to send your engine to KTM
and have them send you back Ryan
Dungey’s engine. That was KTM’s
original plan, but they couldn’t do it.
However, since the MXA wrecking
crew had hoarded away a Factory
Services KTM 350SXF engine two
years ago, we were able to feel the
thrill of what Factory Services is
doing for Troy Lee Designs, BTO
and Rockstar Husqvarna.
First, you have to imagine how
far a 15,000 rpm rev limiter is away
from what you are currently racing.
Even though the stock KTM
350SXF revs to 13,400 rpm, it is not
comparable to 15 grand. There were
sections of racetrack where we never
had to shift out of second gear; we
just let it rip. On the start, we could
carry each gear so far that all of the
other bikes were shifting while our
KTM 350SXF was just laying down
tracks out front. Now we know how
Tony Cairoli is able to get holeshots
against works Hondas, Yamahas,
Kawasakis and Suzukis.
EVEN THOUGH THE
STOCK KTM 350SXF
REVS TO 13,400 RPM, IT
IS NOT COMPARABLE
TO 15 GRAND. THERE
WERE SECTIONS OF
WE NEVER HAD TO
SHIFT OUT OF SECOND
Our bike had more midrange
and unlimited over-rev. It revved so
far that we often shifted too early
because our senses fooled us into
thinking we were at the point where
the cows come home. We weren’t.
The $3500 worth of work in our
leftover engine was mainly focused
on blueprinting the engine, adding
special pistons, valves and cams; but,
the best thing was the tender-loving
care they gave the engine, which
included dynoing it before sending
it back to us.
But, no sense in blabbering on
about the unobtainable. Unless
you get a gig on one of the three
factory-supported teams, you’ll
never feel this engine’s sensations.
However, Pro Circuit can get you
close, and with some extra cash
thrown into a GET ignition system,
you might get to 15,000 rpm. But,
be forewarned: more rpm means a
greater load on the drivetrain and a
shorter lifespan between rebuilds.
We are happy to report that WP
Factory Services has not shut its
doors to helping WP customers.
Plus, they have service centers at PG
Suspension, Factory Connection, SDI
Suspension, Race Tech and Super
Plus Suspension. You can find out
more at www.wpfactoryservices.com
or (951) 234-2254. ❏
With a 15,000 rpm limit we ran a
52-tooth sprocket instead of the
An FMF Factory
4.1 exhaust did
You want to shift at 12,000 rpm.
You really want to shift at 13,000
rpm. Your left foot is twitching at
14,000 rpm. But, the payoff comes
at 15 grand.