|
Suzuki GSX 1100SX Katana Prototype

|
Make Model |
Suzuki GSX 1100SX Katana Prototype |
|
Year |
1980 |
|
Engine |
Air cooled, four stroke, transverse four cylinder, DOHC,
4 valves per cylinder. |
|
Capacity |
1074 |
|
Bore x Stroke |
72 x 66 mm |
|
Compression Ratio |
9:5:1 |
|
Induction |
4x 34mm Mikuni CV |
|
Ignition /
Starting |
Magnetically triggered / electric |
|
Max Power |
101 hp @ 8500 rpm |
|
Max Torque |
9.34 kg-m @ 6500 rpm |
|
Transmission /
Drive |
5 Speed / chain |
|
Front Suspension |
Telescopic, oil damped, spring 4-way adjustable with anti-dive |
|
Rear Suspension |
Dual shock oil damped, damper 4-way spring
5-way adjustable |
|
Front Brakes |
2x 275mm discs 2 piston calipers |
|
Rear Brakes |
Single 275mm disc 1 piston caliper |
|
Front Tyre |
3.50 V19 |
|
Rear Tyre |
4.50 V17 |
|
Dry-Weight |
243 kg |
|
Fuel Capacity |
22 Litres |
In 1980 at the Cologne motorcycle show, the world saw its first Katana. With
its advanced and aggressive body styling, which broke from the more
traditional motorcycle styling leading up to that time, it was sure to be a
show stealer, and it was.
The GSX1100S Katana was released the following summer, in 1981. Quite a lot
of people thought that the Cologne 'concept' bike would be for show, with
not many features retained on the production bike. They were to be proved
wrong, for in 1981, when the GSX1100S Katana was released it retained the
same styling with just a few improvements and changes here and there.
The Katana was designed by Hans A. Muth of target
DESIGN in West Germany. As well as designing the Kat to be a real eye
catcher, they also spent time investigating the best positions for rider
comfort. So the large capacity tank and small fairing are blended together
for the best airflow around the rider and the bike, not just for stunning
appearance.
To gain entry for the bike into Production racing, Suzuki released a 1000cc
version. These are very rear (and expensive) in the UK and can mainly be
distinguished from the 1100 by the use of 32mm slide carbs as opposed
to the 1100's 34mm CV items.
Production Katana
The Katana 1100 that Suzuki
unleashed on an unsuspecting motorcycle world in 1982 was a machine like
nothing seen before from Japan. It was bold, stylish, imaginative,
breathtaking: very different to the succession of fast but visually dull
models that had preceded it. And underneath all the fancy bodywork, the
Katana was an outstanding superbike too.
Katana was the Japanese word for
a Samurai warrior's ceremonial sword, and it fitted Suzuki's sharp new
silver blade perfectly. With its pointed nose, tiny flyscreen. low clip-on
handlebars and swooping tank-seat section, the Katana was a unique machine
with an infinitely more aggressive image than the GSXI100 roadster to which
it was closely related.
This landmark in the history of
Japanese superbike development had partly European parentage. The Katana had
been shaped by the German group Target Design (which had also been
responsible for BMW's striking R90S almost a decade earlier). Although some
riders criticized the Suzuki for being more notable for style than
practicality, most welcomed the alternative to the
formatted 'Universal Japanese
Motorcycle' with its four-cylinder engine and unfaired, upright riding
position that provided no wind protection.
Suzuki had the ideal basis for
the Katana in the 1075CC air-cooled engine from the GSX1 100. with its 16
valves, phenomenally broad spread of power, and reputation for reliability.
To give the new bike extra teeth, the motor was tuned with a modified
airbox, reworked carburettors, new exhaust camshaft and lightened
alternator. It produced a maximum of 111 bhp at 850()rpm. a useful 11 bhp up
on the standard unit.
Chassis layout remained
conventional, and the twin-cradle steel frame was unchanged, but many parts
were new. Suspension was stiffened at both ends, new triple clamps gave a
shallower steering angle for added stability, and the front forks gained a
hydraulic anti-dive system claimed to be similar to that of Suzuki's 500cc
grand prix racers.
Breathtaking acceleration
The Katana looked lightning fast
when standing still, and when moving it was much, much faster. The big GSX
motor was already a superb powerplant. with huge reserves of instant
mid-range torque. The Katana had breathtaking acceleration - and even more
urge at the top end.
Top speed was a
genuine 140mph (225km/h). And the Katana's stretched-forward riding
position, with its welcome bit of wind protection from the small screen,
made that performance more usable than that of most rivals.
Handling was very good for such a
big. heavy bike. The fairing and screen were solidly mounted, so
contributing to the Katana's impressive highspeed stability. The firm
suspension gave a level of control (and discomfort) that was almost Italian,
marred only by the anti-dive's occasional tendency to make the forks lock up
over a series of bumps. The triple-disc brake system worked well, even in
the wet. though this could not be said of the standard fitment tyres.
Inevitably, the radical Katana
did not suit every rider or every occasion. Its suspension was harsh and
uncomfortable in town, its seat was hard, and its steering was quite heavy
al slow speed. But this was not a bike to be ridden at slow speed. Its
purposeful nature was an integral
part of its appeal. At last, this was a Japanese bike that provided both
performance, handling and style, at a sensible price.
The Katana was a huge hit. and
remained popular for years. Suzuki broadened the Katana range with a 1000cc
version with slide carbs for production racing, watered-down middleweight
models, and even pocket-sized 250 and 400cc replicas for the Japanese
market. Years later they even restarted production of a "special edition'
Katana 1100 that was almost identical to the original. Fair reward for a
brave and brilliant bike.
Source Fast Bikes by Roland Brown |