WHAT IS IT? The FMF Factory 4.1 RCT is FMF’s top-of-the-line dual exhaust. It is anodized and has a resonance
chamber, titanium construction, carbon fiber end cap and
comes with a 94-decibel insert.
WHAT’S IT COST? $1249.99.
CONTACT? www.fmfracing.com or (310) 631-4363.
WHAT STANDS OUT? Here’s a list of things that
stand out with the FMF Factory 4.1 RCT anodized full
(1) Dual exhaust. In 2013, Honda decided to equip
the CRF450 with dual exhausts. Their justification was
to move the muffler weight forward for improved mass
centralization. An additional benefit of two tucked-in
mufflers was a reduction in muffler damage in a crash.
In 2014, Honda equipped the CRF250 with dual exhausts.
This is not the first time Honda has installed dual
exhausts on the CRF250. They tried the concept from
2006 to 2009. The downside of the dual exhausts
is added weight, more complexity, wider girth and a
higher price tag. Plus, performance of the stock exhaust
system is seriously lacking.
( 2) Installation. The FMF Factory 4.1 aligns perfectly
and installs in under 10 minutes. As a rule of thumb,
don’t tighten down the bolts until the full system is
installed. That way it can self-align. To remove the quiet
inserts, you will need an 8mm socket on an extension
and some needle-nose pliers.
( 3) Performance. The stock CRF250 powerband
needs help. It makes the least power of any 2014 250
four-stroke. The MXA test crew first rode the FMF
Factory 4.1 exhaust with the quiet insert installed.
We felt that the power was broadened, midrange hit
improved and over-rev lengthened. Next, we removed the
insert, and two things happened. First, the exhaust note
got considerably louder, so use common sense about
where you ride. Second, midrange hit was improved
immensely. The focus of the Factory 4.1 is totally on
the middle, and some top-end was lost, but this was a
good trade. The test riders just shifted at peak instead
of bleeding the rpm dry. Every MXA test rider preferred
the FMF Factory 4.1 over the stock system, and since we
ride our test bikes at the racetrack, we chose to remove
the inserts to take advantage of the improved midrange
( 4) Price. Dual exhausts cost more than singles and
don’t necessarily perform better. FMF offers a single-sided aluminum system with a carbon end cap for $550
less than the full-boat, titanium twin system (and it
WHAT’S THE SQUAWK? The $1250 price tag is a
function of the 2014 CRF250 and CRF450 having twice
as many parts—twice the titanium tubing, twice the
canisters, twice the muffler packing and twice the
The FMF system fit like a glove, produced
better overall power and looked sharp. We
liked everything about it but the price.
FMF 2014 CRF250 FACTORY 4.1 RCT EXHAUST
MXA TEAM TESTED