WHAT IS IT? The Yamaha YZ250 powerplant has been
virtually unchanged for almost a decade. This gave Pro
Circuit’s Mitch Payton more than enough time to tune his
YZ250 pipe and silencer to perfection.
WHAT’S IT COST? $249.95 (pipe), $329.95 (carbon fiber
silencer), $139.95 (aluminum silencer).
CONTACT? www.procircuit.com or (951) 738-8050.
WHAT STANDS OUT? Here’s a list of things that stand
out with the Pro Circuit pipe and silencer.
(1) Installation. All the OEM YZ250 hardware is
transferred over to the Pro Circuit pipe and silencer.
Before installing the pipe, make sure to take the O-ring
out of the OEM pipe and insert it into the Pro Circuit
pipe. The pipe bolted on without any issues.
( 2) Stock trim. The Yamaha YZ250 is one of the most
loved bikes in MXA’s arsenal. It won our 250cc two-stroke shootout, but the powerplant has been relatively
unchanged for almost a decade. Yamaha has thrown
virtually all of its R&D budget into thumpers. We can’t
say that was a bad idea, but the two-stroke market is hot
again, and the benign neglect that Yamaha has shown
its two-strokes is showing. KTM and Husqvarna have
been updating their smokers on a yearly basis (and
have all-new bikes for 2016).
( 3) Performance. Pro Circuit’s Yamaha YZ250 exhaust
system can be described in one word: explosive. This pipe
makes an incredible difference all the way through the
powerband, but it is a shock to the system. The initial hit
was too strong for some of our test riders on dry tracks.
They felt that the sharp burst of power made it difficult to
control the rear end in hard-packed corners;
however, on sand tracks, everyone loved the pipe, as it
had more than enough power to keep the YZ250 in the
powerband. Our testers also felt that they used
the clutch much less than with the OEM pipe due to
the increase in power.
( 4) Silencer. We tested with Pro Circuit’s high-dollar carbon fiber silencer. Why? Because it looked
cool. That proves how shallow we are. And, the fact
that it costs $190 more than Pro Circuit’s regular
R-304 silencer proves that money is no object to the
MXA test crew.
( 5) Tuning. We didn’t touch the jetting on our
2015 Yamaha YZ250. It ran like a champ on premium
pump gas. We might go richer in cold weather, sand or
with more mods than just a pipe.
WHAT’S THE SQUAWK? Three complaints. First,
the carbon fiber silencer is a luxury. If you are looking
for longevity, go with the $190-cheaper aluminum one.
Second, if you don’t own stock in ScotchBrite, you might
want to consider Pro Circuit’s chrome-finish Platinum
pipe. It is the same spec but doesn’t require manual
labor to keep it looking new. Finally, this pipe is best in
the hands of two-stroke riders with serious skills. It hits
hard and pulls even harder.
This is a full-fledged race pipe that
PRO CIRCUIT YZ250 PIPE & SILENCER
hits harder than Mike Tyson in his heyday.
MXA TEAM TESTED