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Design/ Engineering -
Pier Luigi Marconi.
Presentation - Milan Motor Show 1993.
Price then - 33,210,000 Lira.
Engine - The power plant was taken from the Suzuki GSXR 1100 four.
Maximum output of 156 hp at 10,000 rpm and maximum torque of 12 kg at 9000
rpm. Effective engine displacement of 1074 cc. Compression ration of 11.2:1
40-mm Mikuki carburettors, liquid cooled, double overhead camshaft, four valves
per cylinder, wet clutch and five-speed gearbox.
Frame - Frame with a double perimeter beam "Straight Line Connection"
(SLC).
Extruded in aluminium, the beams join at the steering shaft and the swing
arm without joins only cast parts. The body shell itself replaced the small
rear sub frame. Front suspension is 46-mm Paioli forks; rear is via an Ohlins
single shock. Front brakes are double Brembo 320 mm, the rear a single 230-mm.
Alloy wheels made by Antera. There a front fork kit which has titanium tubes
and racing callipers .A second batch of SB6's made in 1995 made some minor
modifications. Rear Body shell re enforced by 3 layers of carbon fibre, re
enforced muffler supports, Marchesini wheels, and carbon dashboard & easier
to read dials.
Colourings - Three sets of colouring.
Series 1 - White, Red & Carbon with the legend "SB6" was red
& carbon.
Series 2 - Dark Grey & Red, with the "SB6" logo in white.
Series 3 - Dark Grey only, with the "SB6" logo in white.
Performance - Top speed of 275.5 Kph and a quarter mile at 10.64 seconds.
Production - A total of 1144 SB6's were built.
Series 1 - 790.
Series 2 - 332.
Series 3 - 22.
Review 1
Quick Fang - Bimota SB6, Japanese Heart - Italian Soul
The Bimota SB6 is one expensive motorcycle, around $35,000 thank you very
much. That is a lot of money when the current crop of Japanese hotshots are
so good these days, at half the price. But if you are thinking Bimota, you
will probably be disregarding price as too much of a factor. You will be after
an exotic Italian with a bit of flair.The GSX-R 11 based engine is a gem with
useable power from around 2500-rpm and upwards. I dipped the clutch at around
2500-rpm in first gear and the front wheel started rising, it can be kept
on the rise by rolling the throttle on as it lifts. A word of warning though
- make sure you also know when to roll the throttle back off, or you will
be sat on your arse well before the tacho' reaches it's 11,600-rpm redline.
The Suzuki engine is slightly modified by Bimota with their own cams and exhaust
system.While the GSX-R 11 has low spec suspension and an enormous amount of
flab (a bit like me really), the SB6 has a light, straight-connection frame,
fully adjustable Ohlins shock and huge Paioli forks. This gives you a hot-rod
hybrid with a Latin touch, which adds to it's exotic flavour.The gearbox also
comes from the GSX-R 11, which has always been one of the best in the business
and performed faultlessly on test. The clutch didn't seem to be up to the
same high standards as the big Suzook's great set-up though.Brembo stoppers
are up to the task but are surpassed by both the R1 and ZX9R in the braking
department these days. The SB6 is showing it's age, where once it could boast
unrivaled power and light weight, it is now left behind by the big bore blasters
from the land of the rising sun in nearly every area bar street cred'.The
Bim's 190 kilograms (dry) puts it a bit on the porky side when compared to
what we see from the current crop of Japanese sportsbikes in 1999.The SB6
is Bimota's most successful model ever, with over 1300 units sold worldwide.
I suppose this would be the kind of bike for you if you crave something exotic
- but love the screaming rush of a 4-cylinder more than the softer delivery
of a twin.
There is also another important edge over the Desmo' opposition, servicing
costs. The SB6 utilizes one of the most common engines seen in motorcycling
over the past ten years; this is reflected in the servicing coming out at
around a third of the price than that of a 916. The Suzuki engine and gearbox
have a record of indestructability that is the envy of all manufacturers.
Another thing it has over the Ducati, by a B-I-G margin. The SB6 does look
better in the flesh than this photo represents, but is no outright stunner.
The YB11, which will be featured here shortly, is a much better looking proposition
to my dodgy eye.The twin exhausts exit from under the seat, ALA 916, which
makes for a great looking rear end on the bike, while giving you a very hot
rear end, and that doesn't mean a good looking bum either. It is fortunate
that the SB6 does not have a pillion seat, I fear a passenger would fry their
buns very quickly if it did.For my money I would take a ZX9, Blade or R1 -
and accompany one of them with the upcoming electric start DR400. This would
leave enough money remaining to keep the two bikes in tyres and insurance
for a year or so.It has lots of very trick bits which are no doubt very expensive
to buy, but I still can't quite get my head around the purchase price.
Review 2
SB6 - Riding Impressions by Roland Brown, for Motorcyclist April 1994, with thanks.
It is not until the tacho needle
hits ten grand and the Speedo nudges the 170 mph mark that my nerves finally
scream "enough" I hit the brakes and with just a light touch on
the clip ons and a couple of downshifts, bank into the rapidly approaching
right hander. I roll the power back on at the corners apex, the red, white
and gray projectile rocketing forward as if shot out of a cannon.
My recollection of the bikes remarkable speed and stability on that stretch
of tarmac remains vivid several days late, and no wonder. Such adrenalin charged
action is no doubt familiar to most GSXR1100 owners, but this machine
.
Bimotas exotic and all new SB6
is an altogether different animal. Though the SB6 and GSXR use the same basic
engine, a spirited ride on bimota's latest confirms what the price tag and
spec. Sheet cannot. That is this is one of the most potent street legal open
classers ever built.
In many ways, the SB6 is long over due. After years of building exotic sports
bikes powered by Yamaha engines (among others), the Rimini firm have finally
produced a chassis for the 16 valve GSXR1100 and 750 engines. That is surprising
too, because the GSXR line has been in need of chassis help for years.
There is no sign of the Tesi type innovation here, but describing the SB6
chassis as "conventional" hardly does it justice. The frame is a
twin beam design of aluminum alloy construction, true. But the broad extruded
spars that run diagonally from the steering head and curve around the engine
also incorporates the swing arm pivots. Bimota claims this design, which it
calls "Straight Line Connection" technology, is more rigid than
the more conventional combination of extruded rails and cast alloy end sections.
The bikes rear sub frame design is even simpler it does not have one. In GP
race bike fashion, the SB6 uses a self-supporting carbon fibre seat unit.
This piece blends smoothly into the fuel tank cover, which is made from an
equally curvaceous composite of carbon and fibreglass. The combo forms a seat
/ tank unit of unprecedented style and lightness.
Well, perhaps not unprecedented, Bimota mavens will recall that the firms
first street bike, the Suzuki GS 750 powered SB2 of 1977, also featured a
gorgeously sculptured full fairing and seat / tank assembly. Like the 6 the
SB2 supported its rider without a rear sub frame - though 17 years ago that
feat required an aluminum lined fibreglass tail section far heavier that the
new bikes carbon construction.
The SB6 tailpiece is notable for more than its strength and lightweight. After
leaving the engine, the 6's four exhausts down pipes converge into two beneath
the engine. These join to form a single pipe that rises vertically though
a gap in the swing arm, then runs back to two horizontal silencers in the
seat hump. With the bodywork on the only visible parts of the entire exhaust
system are the silencers tips, which emerge above the rear taillight and carbon
fibre mudguard.
The swing arm is a typically stout rectangular alloy unit, unusual in that
its rising rate rocker arm is located on the right hand side, rather than
the centre and is connected to an Ohlin's shock that is mounted horizontally
along that side of the bike. Positioning the shock there allows Pierluigi
Marconi, Bimota's chief engineer, to keep the bikes length to a minimum. Wheelbase
is 54.7 inches, 3.7 inches shorter that that of a standard GSXR, and more
than an inch less than on Bimota's FZR 1000 engined Furano.
Predictably the rest of the Bimota's chassis dimensions are on the small side.
The SB6 weighs in at 418 lbs dry, unremarkable for a Bimota four (and slightly
more than a Fireblade), but a significant 90 pounds less than a stock GSXR1100.
Rake and trail are defined as 23.5 degrees and 3.7 inches (the GSXR's fork
legs are slightly less steep), though the fork angle can be varied by a half
a degree either way using steering head eccentrics.
The fork itself is decidedly unusual; the tubes are ultra thick, 46mm diameter
cartridges, built by Paioli, with sliders made from a composite of aluminium
and carbon fibre for extra rigidity. Quick release fittings hold the familiar
combination of 17-inch magnesium wheel, Michelin Hi Sport radial and a fully
floating 320mm Brembo discs gripped by four piston Gold Line calipers.
If the chassis is almost entirely new and trick, then the power plant is much
less so, as Suzuki's water-cooled 1074cc mill is employed in totally untouched
form. Even the quartet of 40mm Mikuni carbs remains, though they are re jetted
to suit the new exhaust system. Bimota claim its pipes boost midrange power
by up to 12 bhp, while peak output rises by a solitary pony to 156 bhp at
10,000 rpm.
Any added performance cannot come through extra noise, for when the SB6 fires
up, it is most noticeable sound is a typical GSXR-type whirring and rustling
from the engine. Riding position is typical Bimota, low clip ons, high rear
sets, and low thin seat. Cockpit view is a mix of neat carbon mounted clocks,
a massive milled from billet top triple clamp, standard switchgear, too narrow
mirrors and an incongruously scruffy pair of batteries visible between the
headlamps.
The SB6 feels compact and firm even by Bimota's standards, pulling away with
a raw, almost menacing presence that seems to emphasize its status as one
of the most single minded street legal missiles ever built. Brush the throttle
in the lower gears and it explodes forward, lifting its front wheel in first
gear in a way the peaky, chunky standard GSXR cannot manage.
Even on my first slow speed trip through Rimini, the bike seemed aggressive
and eager to get going. This is no bike for around town riding, and the SB6
feels predictably firm and uncomfortable burbling along the narrow streets.
Once out of town, however, the story is totally different. On normal country
roads, the SB6's previous imprecision is instantly forgotten, replaced by
a feeling of almost total control and security. At faster speeds, the suspension
begins to work properly, the fat Hi Sports get hot and sticky, the rigid frame
begins to earn its keep as the SB6 encourages me to throw it through corners
at a pace that would have many bikes sliding into the surrounding vineyards.
Steering is neutral and light without ever feeling nervous. Despite its lightness,
the SB6 feels though there is plenty of weight over its front wheel. And although
the compact Bimota changes direction quickly when required, it shows no hint
of high-speed instability even with the steering damper (mounted on the right
side) backed off to its lightest setting.
Far from needing radical attention to its multi adjustable suspension, The
SB6 takes all the cornering abuse I can put through its chassis with ease,
although Bimota's test rider Gianluca Galasso (who had set up the bike) is
a bit lighter than me. Even when I go into a decreasing radius curve too hot
and have to take a precautionary extra squeeze of the front brake well into
the bend, the Bimota barely twitches before regaining its composure and carving
its way through.
You would need a race track to make this bikes Öhlins shock and 180 section
rear Hi Sport get close to losing their composure on the way out of corners,
even though the SB6 pulls plenty of torque. The latest water cooled version
of Suzuki's big GSXR engine is strangely weak at low and medium engine speeds,
though Bimota's revised exhaust system does seem to have provided some of
the missing midrange. The Sb6 picks up strongly at 4000 rpm and accelerates
from then on with satisfying enthusiasm.
At higher revs, there's even more of the mind-blowing force that the big GSXR
has always been happy to provide. As you flick through the slick five-speed
box, the SB6 storms towards its 11500-rpm redline with an urgency that makes
you glad of the Brembo front brake systems ever-reliable power and feel. This
bike is not really about top speed, of course, though the GSXR engine provides
plenty of steam on top.
The SB6's only engine related disappointment is that it retains a slight buzziness
typical of the big GSXR power plant. The engine is fixed to the frame using
two main bolts at the rear, plus two mounts either side of the cylinder block.
Some high frequency vibration comes through the handlebars and seat at most
engine speeds, and although it is not a really serious problem, my feelings
is that the FZR 1000 based Bimota's are a bit smoother.
As to whether the SB6 is a better bike than the fearsome Furano, in most respects
the verdict is to close to call. According to Bimota's own figures the Furano
is slightly lighter and more powerful, and it probably has a little more midrange
response, too. The SB6 is surely more handsome and every bit as rapid in the
real world, and its considerably less expensive than the fuel injected Bimota.
The bikes competitive price of $19996 (at least relative to Bimota's traditionally
elevated standards) has been made possible in part by the firm's intentions
to increase 1994 production to around 900 bikes - a record amount. And although
a third of those will be SB6's, it remains a rare and exotic machine, one
bursting with gorgeous styling, immaculate detailing, leading edge technology
and stunning performance that makes these hand built bikes so special.