WHAT IS IT? Cycra’s performance-driven Powerflow
Yamaha shrouds aim at improving airflow while
narrowing the YZ-F cockpit at the radiators.
WHAT’S IT COST? $124.95.
CONTACT? www.cycraracing.com or (800) 770-2259.
WHAT STANDS OUT? Here’s a list of things that stand
out with the Cycra Racing Yamaha Powerflow shrouds.
(1) Design. The stock 2014–’ 15 YZ250Fs and YZ450Fs
use a two-piece shroud design with the airbox cover
integrated into the upper radiator guard. It’s a complex
layout. The upper radiator winglets direct air into the
filter area. Accessing the airbox requires removing three
fasteners. The stock YZ-F radiator guard/airbox design is
a Rube Goldberg device that could stand to be improved.
That’s where Cycra Racing came in.
( 2) Development. Cycra worked closely with the
JGR Yamaha factory-backed effort, which is conveniently
located an hour from Cycra’s headquarters. JGR has
been racing with Cycra’s Powerflow shrouds since the
beginning of the 2014 Supercross series, and the shrouds
have only recently become available to the public. This is
a true testament to how thorough Cycra is with research
( 3) Powerflow. Cycra doesn’t merely replicate the
stock plastic pieces. That would be too easy. Instead,
they find numerous ways to improve on the stock design.
The goal is to strengthen weak mounting areas, restyle
the design, reduce weight and improve airflow with
their signature Powerflow concept. What is Powerflow?
Based on Bernoulli’s principle, it is a series of interrelated
shapes that speed up the air as it flows in and around
the plastic parts. The key parts are specially shaped
scoops that direct air into and out of the airbox, along
with inlets on the separate airbox cover for maximum
( 4) Installation. When installing a product, the MXA
wrecking crew always takes the most direct approach.
Why? We don’t like reading directions, and, more
important, we understand that most motocross racers are
just like us. Hence, we tried every conceivable method
when installing the Cycra Powerflow shrouds. Here’s
what we learned. (a) Read the instructions. (b) Don’t
expect to use the Yamaha’s shroud spacers, because
they won’t fit in the plastics. Fortunately, Cycra includes
the necessary hardware. (c) You’ll need to remove the
lower shroud pieces; the Cycra shrouds are a one-piece
design. (d) Do not tighten any fasteners until every part
is installed. (e) Seriously, read the instructions.
( 5) Performance. We were very pleased with the
Cycra Racing Yamaha Powerflow shrouds. Testers raved
about the narrower feeling in the cockpit, particularly
in the space behind the radiators. Increased airflow to
the airbox was noticeable, with an increase in throttle
response. Test riders noted that engine performance
was also improved, along with the increase in noise that
comes with the rush of air. We liked that Cycra incorporated holes into the airbox cover to allow the fuel vent
hose to be hidden. Another plus was that Cycra included
flat-head Allen bolts that fit flush against the plastic,
meaning that we didn’t catch our knees on them.
( 6) Options. The Cycra Yamaha Powerflow shroud
kit is available for 2014 and 2015 Yamaha YZ250F and
YZ450F models. There are four color choices: blue, white,
black and Lightning Gold (a retro-looking yellow that
harks back to Bob Hannah’s glory days).
WHAT’S THE SQUAWK? Although installation seems
straightforward, there are a few tricks.
Cycra’s Powerflow shrouds increase airflow to
the engine, maximize radiator efficiency and
improve rider interface. Didn’t think that
plastic could boost performance? Guess again.
CYCRA YAMAHA POWERFLOW SHROUDS
MXA TEAM TESTED