WHAT IS IT? Being the official exhaust pipe of the BTO
Sports and Troy Lee Designs KTM teams has its perks.
FMF Racing teamed up with KTM PowerParts to develop
an aftermarket exhaust system for the 2016 KTM 250SXF
(using the 2015-1/2 Factory Edition as the test mule). The
pipe is made by FMF and sold through KTM PowerParts
and FMF direct.
WHAT’S IT COST? $999.99.
CONTACT? shop.ktm.com or your local
WHAT STANDS OUT? Here’s a list of things that stand
out with the 2016 FMF Factory 4.1 KTM 250SXF exhaust.
(1) Stock. KTM released a 250SXF Factory Edition for
the first time ever in 2015. It was well worth the wait.
The all-new engine boosts performance in areas where the
bike previously struggled, particularly in bottom-to-mid-range power. The KTM 250SXF Factory Edition peaks at
14,000 rpm, just as the old engine did, but is significantly
better from 6000 to 9000 rpm. This is an improved version
that Novices and Vet racers really appreciate; however,
there is a catch. The 250SXF Factory Edition powerband
still doesn’t have the midrange hit that most riders desire.
While the Factory Edition is night-and-day better than the
2015 250SXF base model, there’s still room for
( 2) Exclusive. We should clear up any confusion
as to why Factory Edition owners must order the FMF
Racing Factory 4.1 exhaust through KTM’s PowerParts
division. FMF makes the exhaust systems in its Rancho
Dominguez, California, factory and then ships them 75
miles away to KTM PowerParts in Murrieta. This is an
exclusive deal between two brands that will end once
the 2016 KTM models are released. Until then, it’s only
possible to purchase an FMF Factory 4.1 exhaust for the
2015-1/2 KTM 250SXF Factory Edition (and 450SXF-FE)
through the KTM PowerParts division. After the 2016
KTM hits the showrooms, the pipes will be available from
both Powerparts and FMF.
( 3) Development. Believe it or not, this is the same
pipe and silencer combination that Jessy Nelson, Darryn
Durham and Shane McElrath are using in the 250 class.
FMF focused on increasing bottom and midrange power
so that the 250SXF could be short-shifted and still run
strong. As anyone should expect with a premium-priced,
limited-edition bike, the FMF Factory 4.1 exhaust system
is only available in titanium. It also comes with a
carbon end cap. As a result, FMF was able to knock
2-1/2 pounds off the stock exhaust system.
( 4) Installation. Removing the stock exhaust
system was as challenging as cracking the Linear B
code. We had to remove the shock linkage from the
front mount to create clearance to get the shock off the
bike. Why are we removing the shock when we should
be removing the pipe? Surprise! The stock KTM pipe
can’t be taken off until the shock is lying on the ground.
Conversely, installing and removing the three-piece FMF
Factory 4.1 exhaust was a breeze.
( 5) Performance. The 250SXF-FE FMF Factory 4.1
exhaust offered exactly the kind of performance boost
that test riders were looking for. In place of last year’s
sluggish midrange, FMF uncorked a powerband that
yielded greater gains in throttle response and midrange
output. Novice riders appreciated the markedly stronger
hit; Intermediates raved about the strong pull from the
midrange to the top end; Pros were equally impressed,
although they did mention that over-rev was lessened by
the FMF exhaust. Overall, the 250SXF Factory Edition
FMF Factory 4.1 was a slam dunk.
WHAT’S THE SQUAWK? Installation was not easy.
That’s not a complaint against FMF, but instead against
KTM’s engineers, who must not believe that KTM
owners ever remove the stock exhaust system. Be
prepared to remove the shock.
FMF Racing, with help from
2016 FMF FACTORY 4.1 KTM 250SXF EXHAUST
its professional KTM race teams,
developed a winner in the 250SXF-FE
Factory 4.1 exhaust. It’s the cat’s meow.
MXA TEAM TESTED