American Motorcycle Dealer AMD 242 September 2019 | Page 33
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Engine assembly
Ultima cylinder heads
fixtures that insure a perfectly square cylinder top to
bottom. All the 4.25 inchers are baked and slowly
cooled to stress-relieve the liner, with the 3.875" and
4" bore cylinders having a thicker liner (therefore
stress-relieving is not necessary). Cylinder bores are
held to very tight tolerances within +/- .0001".
"Ultima cylinder heads are machined to tight
tolerances also," says Brian. "All valve seats are cut
in- house on Newen fixed turning machines. Every
head is then assembled using high quality
components from Pac Racing, Ferrera and AV&V. All
heads use chromoly spring retainers. The 140" CNC-
ported heads use titanium spring retainers.
Compression releases are standard in all of our
heads and after assembly every head is vacuum
tested to insure the valves seal completely."
All sub-assemblies then come together on the
assembly line, where the short block is then
assembled, with every engine getting a high-volume
billet oil pump. Camshafts for Ultima engines are
www.AMDchampionship.com
manufactured and ground
by Andrews to Ultima
specs. Johnson hydraulic
roller lifters are then
installed in the lifter blocks
with chrome or black
powder-coated lifter
blocks, cam cover and
Ultima pre-programed
ignition module installed
to finish off the lower end.
"The upper end then
starts to come together,
with the cylinders
matched to top quality
forged aluminum pistons
from Mahle. Multi-layer steel
head gaskets and Colony head bolts seal up the
cylinders and heads. The intake manifold is now
installed and vacuum-tested to insure proper seal,
and Ultima chrome or black rocker boxes with our
patented stainless steel reed assembly top off the
engine. Ultima American made 4140 adjustable
pushrods carry the load from the lifters to the 4140
forged steel roller rockers.
"Then the engine reaches the test stand. At this
point it is run with an electric motor to prime the
oiling system. Oil pressure and compression are
checked at this point and after passing these tests,
the carburetor is mated to the intake manifold. The
motor is then cleaned up and inspected for leaks.
Finally, the motor is bagged and boxed in sturdy
spray foam packing and ready to ship to your door."
Brian went on to explain that having all these
capabilities in-house puts them in a superior position
to be able to let dealers share in their experience and
expertise.
"Basically, there isn't much
we can't do. Our engine
rebuilding service is available
to our dealers worldwide. By
offering this service, the
dealer's customer gets a
quality rebuild complete with a
6- month, 6,000 mile warranty.
"However, it doesn't stop there.
We are also offering this service
for S&S and Harley-Davidson
Evo V-twins as well - adding
another option to get that motor
rebuilt correctly, and at an
unbeatable price."
Ultima offers this service for all
Ultima engines, 80" thru 140", and select Big Twin
Evolution style engines and the Twin Cam "A".
Ultima machine shop services extend from the
crankshaft and cases to the cylinders and heads. This
includes, for Evo models, "True and Rebuild" for the
Evo crankshaft; disassemble inspect, fit new rod set
to new crankpin and bearings, balance and
reassemble with sprocket or pinion shaft as an
additional option.
"We will bore the case for big bore cylinders (Evo
and Shovelhead) and recondition the deck base
gasket surfaces.
MIDWEST MOTORCYCLE SUPPLY
Pevely, Missouri, USA
Tel: 636 931 3200
[email protected]
www.MidwestmcDealerExpress.com
www.ultimaproducts.com
AMERICAN MOTORCYCLE DEALER - SEPTEMBER 2019
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