WHAT IS IT? Italian pipe manufacturer Scalvini is
known for its exotic-looking, handmade cone pipes and
carbon fiber silencers. Specializing in the two-stroke
market, Scalvini makes pipes for 50cc bikes all the way up
to Honda CR500s.
WHAT’S IT COST? $279.00 (cone pipe), $175.00 (
alumi-num/carbon silencer), $247.00 (full carbon silencer).
CONTACT? www.scalvinipipes.com or (760) 949-0941.
WHAT STANDS OUT? Here’s a list of things that stand
out with the Scalvini Yamaha YZ125 cone pipe and carbon
(1) The cone effect. Works two-strokes from a bygone
era were admired for their hand-welded cones. Think
back to the glory days of Jeremy McGrath and his
brushed steel expansion chamber. Today, cone pipes
have all but vanished. Why? Four-strokes don’t need
cones, and the labor-intensive work required to build 17
different segments makes them very expensive. Scalvini
pipes are the exception.
( 2) Construction. Scalvini painstakingly makes every
two-stroke cone pipe by hand. It’s an arduous process that
requires welding flat pieces of steel in a circular fashion
and then crafting the individual pieces into an expansion chamber. And that is only a small part of the work
required. Once the cones are welded together, every weld
is ground down and pounded with a mallet to a smooth
shape. Note that a Scalvini pipe isn’t comprised entirely of
cones. The head pipe is stamped to lessen manufacturing
time, which helps lower the price tag.
( 3) Installation. We had problems installing Scalvini
pipes in the past, and that string continued with the 2015
Yamaha YZ125 pipe test. We mounted the expansion
chamber and struggled to line up the mounting brackets
with the YZ125 bolt holes. It took one person to push the
pipe in place while another tightened the fasteners. We
slid on the silencer, but the mid-pipe was so badly
misaligned that the silencer wasn’t close to mounting
to the subframe. It took a judicious use of force to
massage the silencer into position. We’ll chalk up the
poor installation to a slight miscalculation in the angle
of the mid-pipe.
( 4) Performance. The Yamaha YZ125 has a broad
and usable engine, but it fails to produce the power
output of a KTM 125SX. With the Scalvini pipe and
silencer, we noticed a slight improvement in the YZ125’s
midrange, but we traded bottom-end. The system pulled
farther up into the rpm range, but it was peakier and
harder to keep in the sweet spot. Based on past experience, we paired the Scalvini pipe with the stock YZ125
silencer. That combination produced better results, as
bottom-end hit and over-rev returned. It also helped
broaden the powerband, making it easier for riders to
stay on the pipe. Overall, we would opt for the Scalvini
pipe with the stock silencer. Unfortunately, that pairing
also caused difficulty during installation, as we were
only able to use one silencer bracket.
WHAT’S THE SQUAWK? Let us count the ways.
(1) Installation was horrid. ( 2) The Scalvini pipe/silencer
combination took away the broad and usable powerband that the YZ125 is known for. ( 3) Although the
Scalvini pipe and stock YZ125 silencer worked well, they
failed to mount together properly.
We rated the Scalvini pipe as a two-star
SCALVINI YZ125 CONE PIPE & SILENCER
product because it didn’t line up with either
silencer. Installation was a nightmare.
MXA TEAM TESTED