240 / 480
ENGINE
240
accessories
towables
body
controls
electrical
driveline
engine
fuel &
intake
chemicals
tie downs
tools
MARINE
towing &
loading
Powersports Forged Piston Advantage
Wiseco leads the performance aftermarket by producing the highest quality forged pis-
tons for Dirt Bikes, ATV’s, Snowmobiles, Outboard Marine, and Motorcycles right here
in the USA. Wiseco is unique because we forge all of our own pistons in house, and pro-
duce all of our own forge tooling right here in the USA. This allows us to control all
aspects of our manufacturing process from raw bar to skirt coating finished parts.
In addition, in-house dyno testing gives Wiseco the ability to develop state-of-the-art tech-
nology such as new shapes, coatings, and components, and lead the industry through rig-
orous R&D. Linking all segments of Wiseco’s organization through design, testing, man-
ufacturing, and distribution allows us to fulfill market needs with minimum lead-times.
Extreme racing conditions demand the strength and toughness that only forged pistons can
offer. Compared to cast pistons, forgings are tougher and more durable, and will stand up to the
abuse that high performance motorsport applications require. Most castings are brittle, have no
grain structure and tend to fail catastrophically when the material yield strength is exceeded. Forgings have condensed grain that is aligned to the
features of the part, which produces higher mechanical properties, and resistance to impact and fatigue. Each forging is designed to optimize the
strength-to-weight ratio, and maximize performance.
Piston Engineering / ArmorGlide Coating
Wiseco’s detailed skirt shapes and profiles are very specific to each application. Variable cam
programming software developed in house allows Wiseco to produce high-performance shapes
unique to only Wiseco. The skirt shape (barrel/cam) is one of the most functional areas on the
piston, and provides stability and smooth operation in the cylinder bore. Stability is important
for proper ring seal, reduced friction, and quiet operation. Each skirt shape is designed for a
specific running clearance, based on coefficient of thermal expansion of the piston alloy. Some
forging alloys expand more than casting alloys, but each Wiseco piston is designed with the proper installed clearance to produce the most power,
least wear, and best seal at running temperature, for each application. Comparing installed clearances on cast vs forged parts is not indicative
of the running clearance at temperature. Wiseco engineers have a strong background in all forms of racing applications, and produce the best
shapes and designs in the industry.
Some of our forged pistons offer our new ArmorGlide™ skirt coating, which is the result of testing, development, and benchmarking through
Wiseco’s rigorous in-house dyno program. The outcome is the ultimate in skirt coating toughness, lubrication, and bond technology working
together to minimize friction, maximize horsepower, and provide improved wear resistance. Not only is ArmorGlide™ a high-tech lubricant that
reduces friction, but it also allows the piston to be fitted tighter within the bore allowing a better ring seal and reduced noise from piston rock.
Top End Piston Kits
Wiseco’s complete top end Piston Kits are offered for nearly every popular application in the
powersports market. These kits contain everything you need to complete your rebuild the right
way, the first time. High quality parts specifically chosen by us to match our forged pistons are
included in this kit for easy one stop shopping.
• 2-stroke kits feature our Pro-Lite™ pistons that are CNC machined for optimal cam shape
and profile for peak HP and service life.
• 4-stroke kits feature a ‘race-ready’ dome finish with smooth edges for improved combustion
flow. Horizontal slot-pin oiling reduces friction and provides scuff resistance, along with a
pressure seal groove for maximum ring seal.
• Most PK/SK/WK/VT kits from Wiseco feature a complete top end gasket kit that gives you
everything you need to complete your rebuild from premium materials.
• 4-stroke race applications feature Wiseco’s ArmorGlide™ skirt coating to provide reduced
friction and noise to contribute to increased horsepower.
• Dedicated forgings used for superior strength to weight ratio utilizing aerospace alloy.
• High Performance ring kit and alloy pin included with each piston kit for extended life and
sustained power.
FORGED POWERSPORTS PISTONS