S&S 160CI Billet Pro Stock Engine
The engine you see before you is not your average V-twin.
With extensive S&S engineering accomplishments, nothing
compares to the 160ci Pro Stock powerhouse. This billet beauty
is a 60-degree monster delivering well over 300 horsepower at
the rear wheel of any race bike! Designed to shock the drag
racing world, the S&S Billet Pro Stock engine is as good looking
as it is a mechanical masterpiece.
Built with billet crankcases and heads, the engine is an
manufacturing marvel. Still using pushrod technology, the
engine has links to past four-cam designs—but just barely. The
billet Pro Stock flywheel assembly carries billet aluminum
connecting rods on a 1.500-inch crankpin. Built for racing—and
racing only—the bore and stroke is 5.118 X 3.875-inch coupled
with 2.710-inch intake and 2-inch exhaust valves. This
combination, along with automotive-style rocker arms allows
the Pro Stock to rev to about 10,000 rpm! There are a variety of
available S&S cam designs, but they typically entail 1.00-inch of
lift—which of course means the valve springs must be incredibly
A pair of downdraft intakes are fed by S&S designed fuel
injection, the very same VFI system available for street bikes
from 80ci to 124ci, which demonstrates how versatile the S&S
ProTune software really is. Another unique feature of the Pro
Stock engine is the built-in six-speed automatic transmission.
When installed in a drag race chassis, the rider has a normal
clutch lever to use for only the initial first gear start, but once off
the line he uses a pushbutton to jump through the remaining
When this 175-pound engine and transmission are mounted
in a Pro Stock bike—like the Drag Specialties/G-Squared/S&S
bike piloted by Chip Ellis—it can break through the ¼-mile lights
at just under 7 seconds and reach speeds of over 190mph in
that time. This is clearly not just any old engine.
There are seven teams competing in the NHRA Pro Stock
Motorcycle class using S&S engines to go up against the other
manufacturers (Harley-Davidson® and Suzuki). The riders of
these seven bikes experience power that most of us can’t even
imagine. To fully understand what those seven seconds matched
to a ¼-mile represent, take a look at a clock with a second hand.
Watch a full seven seconds. Now imagine going 0-60mph in just
under one-second. Then visualize 0-100mph in two seconds
total, and in two more seconds (four total) picture flying at
150mph--on two wheels. That friends, is what fast is all about.
Chip’s best run ever blasted him through a quarter mile in 6.911
seconds, at 193.21 mph!
If you have not attended an NHRA event and witnessed the
sounds of the S&S Pro Stock powered teams, it is an absolute
must do. There is still one race left in the 2006 season, held in
Pomona, California in early November, during Love Ride
Weekend (next week). If you miss that, just go to
www.sscycle.com over the winter and you will find the 2007 race
season schedule as soon as it is released.
Here's a shot of Chip's Pro Stock bike by Matt
We hope to feature a couple of bikes, exclusively built
around this new S&S powerhouse over the next couple of