YOSHIMURA RS- 9
A parallelogram-shaped muffler increases volume over
stock, targeting an improvement in throttle response and
noise cancellation. The dual setup positions the mufflers closer to the bike’s center of gravity (mass centralization), resulting in better handling for the rider. An additional benefit of
the mass-centralization process is decreasing potential for
muffler damage in the event of a crash. We tested the price-point version (stainless/aluminum), and it saved just about
two pounds over the stock exhaust system.
Power: This is most definitely the “hit” monster of the
group! It actually feels soft down low, mainly because when it
roars, it comes on hard and fast. It is a pro’s delight, as it has
the ability to carry higher speeds and doesn’t generate the
modicum of roll-on that the vet or lesser-experienced rider
demands. So that’s how the ratings roll—the pros loved the
Yosh system, and the vets liked stock better.
PRO CIRCUIT TI- 5 TITANIUM
The Ti- 5 dual-exhaust system is all titanium throughout the
muffler can, header and mid-pipe areas. The Pro Circuit
header has an RC- 4 resonance chamber that eliminates hard-edged exhaust pulses, and the rear cans are titanium and
asymmetric in design. Weight-wise, the Pro Circuit is feathery
and chopped off 2 full pounds.
Power: The Ti- 5 from Pro Circuit pushes the muscle load to
the mid and peak portion of the powerband, which made it
quite tasty for our higher-end evaluators. With a newfound
mid hit and smooth increases up into the stratosphere, the
Pro Circuit system is all about racing and staying in the main
meat of the powerband. On the vet side, this unit didn’t rate
as well, as the softer bottom end tended to hurt the rider’s
ability to short-shift and hunt for low-rpm power. ;
FMF RACING FACTORY 4.1 RCT ANODIZED
FULL-SYSTEM CARBON END CAP
The FMF dual exhaust was the only system in the shootout
to follow Honda’s lead and use two different-sized mid-pipes.
The all-titanium system uses FMF’s MegaBomb header, which
targets both noise reduction and bottom-power enhancement, and it comes with spark-arrestor inserts. The rear cans
use a carbon fiber end cap. Installation was spot-on.
Everything lined up perfectly; the fit was dead-on, and the
system weighed in at 8. 3 pounds, good for over a 2-pound
Power: No doubt the best roll-on of the group, which mates
to a very strong middle hit and a seemless top-end hook.
Overall, our group of testers rated this system as superb, giving it the award for the best spread of power throughout the
range. Note: Our pro tester rated the system highly, and, as
important, so did our vet rider.
2013 HONDA CRF