AMD 252 July 2020 American Motorcycle Dealer 252 July 2020 | Page 50
KB Super Duty 120" M-8 Pistons
with 'Line2Line' Coating
Boise, Idaho based distributor HardDrive/WPS
continues to add to its V-twin product line with several
new brands now available ready to ship to U.S. dealers
- from National Cycle screens to ODI Lock-On V-twin
grips and Flo Motorsports adjustable levers and MX
style footpegs to BOSS Audio products and, as seen
here, KB Super Duty Series pistons for 2017 and up
114" and 117" M-8 applications.
Designed for 120" displacement and giving an 11:1
compression ratio, they have generous valve pockets to
accept 1 mm larger valves and are available for stock
cylinders bored to 4.125" and in +0.010" increment
bore sizes right up to +0.060 for 4.185" bore.
Based at Carson City, Nevada, manufacturer United
Engine & Machine (UEM) is noted for its use of highquality
materials and advanced coatings. These
Super Duty Series KB pistons have a hard anodized
crown that aids with heat deflection and reducing
corrosion from alcohol fuels and top ring groove hard
anodizing eliminates micro-welding of the ring to the
groove, maintaining a flat and smooth surface for
best ring seal.
They have round wire locks and premium Hastings 1.2
mm, 1.2 mm and 3.0 mm rings with a steel nitrile top
ring and a ductile Napier second; the complete kits
include two pistons, rings, pins and locks.
These M-8 series pistons are made in forged 4032 low
expansion alloy and feature 'Line2Line' .003" total
thickness abradable skirt coating as standard - a
polymer based formulation applied to the thickness of
the piston-to-wall clearance for a ZERO install
clearance. The coating abrades in on start-up to hone
for the perfect fit per cylinder, eliminating piston rock
for the best possible ring seal with no piston slap noise
and a tight, quiet running clearance.
By reducing the clearance, engine efficiency is
improved, lowering friction, maintaining an even oil
film and protecting against scuffs and excess wear. Also
available for Twin Cam applications, KB standard skirt
coated and some 'Line2line' coated Super Duty Series
performance pistons are offered in hypereutectic 390
alloy as well as 4032 alloy for some applications.
HARDDRIVE V-TWIN
Boise, Idaho, USA
Tel: 208 376 8400
[email protected]
www.hdtwin.com
www.uempistons.com
Pro Fill Air Chuck
Loomis, California based Motion Pro, the
'Official Tools, Cables and Controls' brand to
American Flat Track racing, continues to add
regularly to its V-twin tools and
accessory programs.
Like a lot of the best ideas,
simplicity and ergonomics are
the Tech's friend, and the Pro Fill
air chuck seen here answers a
perennial issue, as the V-twin
product specialist, Joe Fratis, says,
"getting to a hard to reach tire
valve can make tire filling a big
pain.
"The Pro Fill air chuck from
Motion Pro provides an innovative
swivel head, making it easy to
reach any tire valve with tight
clearances. The patented
pivot head on the Pro Fill air
chuck rotates to adjust the angle relative
to the handle and obtain the best
positioning possible to easily fill
tires.
"The Pro Fill air chuck can be
connected to your air source with
use of a standard 1/4 NPT female inlet
and also is a great complement to the
Motion Pro digital tire pressure gauge. The
versatile Pro Fill air chuck works great on
most motorcycles, ATVs and UTVs."
MOTION PRO
Loomis, California, USA
Tel: 650 594 9600
[email protected]
www.motionpro.com