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Bimota YB9
Bellaria

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Make Model |
Bimota YB9 Bellaria |
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Year |
1990 |
|
Engine |
Liquid cooled, four stroke, transverse four
cylinder, DOHC 4 valves per cylinder. |
|
Capacity |
599 |
|
Bore x Stroke |
62 x 49.6 mm |
|
Compression Ratio |
12.0:1 |
|
Induction |
4x 38mm Mikuni BDST32 |
|
Ignition /
Starting |
Transistor controlled digital / electric |
|
Max Power |
95 hp 69.3 kW @ 10500 rpm (rear tyre 81.1
hp @10500 rpm) |
|
Max Torque |
68.5 Nm @ 8500 rpm |
|
Transmission /
Drive |
6 Speed / chain |
|
Frame |
Two diagonal beams in section bar made of
aluminium with internal ribbing. The cylinders are supported by plates
bolted to the beams and the swing arm is made of aluminium |
|
Front Suspension |
42mm Marzocchi forks, anti dive system in the
left tube of the fork leg and a hydraulic brake in the right. compression
and rebound damping adjustable. adjustable by four positions |
|
Rear Suspension |
Marzocchi single shock, compression and rebound
damping adjustable. |
|
Front Brakes |
2x 320mm discs 4 piston calipers |
|
Rear Brakes |
Single 267mm disc 2 piston caliper |
|
Front Tyre |
120/70-17 |
|
Rear Tyre |
160/60-17 |
|
Dry-Weight / Wet-Weight |
175 kg / 188 kg |
|
Fuel Capacity |
11 Litres |
|
Consumption average |
18.2 km/lit |
|
Braking 60 - 0 / 100 - 0 |
12.8 m / 37.6 m |
|
Standing
¼ Mile |
11.4 sec / 190.7 km/h |
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Top Speed |
237.1 km/h |
YB9 Bellaria
- Bearing a strange resemblance to the VFR750 Honda of the late 1980s, the
Bellaria wasn't the outrageous stunner that many expected. In addition, it's
Yamaha FZR600 powered chassis wasn't in another dimension compared to its rival
from Japan.The FZR600 was one of the sweetest handling - and fastest - mid sized
bikes of the Eighties in fact.One of Bimota's off days? Read the feature and
find out.
Bimota's first bicycle built for two is intended to be a sports-tourer supreme.
A machine for blasting across sunny Alpine passes and for carving curves, for
"wide spaces and the land of freedom, where the wonderful emotions of a couple
are intensified". (Quoting from Bimota brochures is clichéd but sorry, I just
can't help it...)Some chance. Mid-February in England meant storm-clouds on the
horizon, gusts of icy wind swirling rubbish into the air, fingers numb inside
thin gloves, watery sun showing very occasional bursts of interest, policemen
much more keen to intervene. It says a lot for the Bellaria that the cops were
just fascinated and that the bike had me enthralled despite the weather - though
its sheer class really hit me only after I'd got off.With time short and rain
forecast, we'd picked a particularly nasty roundabout to take photographs.
Light on
traffic but uncomfortably small, its lap-time of only 20-odd seconds means you
can bash off a roll of film in minutes rather than hours - if the rider can
stand the strain of constant concentration as he picks his way round the damp
patches, tarmac seams and dead leaves while dragging limbs in suitably dramatic
style.On many bikes its a real effort to keep going, your once-smooth course
becoming increasingly ragged due to cramped legs, jarred wrists and the fight
either to heave around some unwieldy brute or to point a flighty front-end in
the right direction. The Bimota was no handful. Beautifully poised, supremely
stable, it virtually plotted its own rapid but effortless course, the odd hollow
brush of knee scraper on tarmac cutting in with a sound like that of skis in
crisp snow above the busy whine of the engine.Such good manners had been
expected. Much less predictable was the fact that after finishing 100-plus laps
with barely a break, my legs and arms weren't aching and I could easily have
carried on for more. The words "comfort" and "Bimota" have in the past been
almost a contradiction in terms. The Bellaria, the company's first purpose-built
two-seater and the first machine that designer Pierluigi Marconi can really call
his own, changes that. Not only does the "Beautiful Air" feature a reasonably
plush dual seat, complete with grab rail and not a tailpiece or piece of
glued-on foam in sight, but other ergonomics have been subtly modified too. Bars
are still clip-ons, of course, but they sit a few inches higher than the
steering head. And the rider's footrests are set a little lower than on bigger
Bim's, for a considerably more roomy riding position. If the Bellaria's pastel
colouring suggests a softer approach after years of harder reds and greens, then
that is doubtless what Marconi intended.It's ironic that the machine around
whose engine all this is based,
Yamaha's
FZR600, is by far the most single-minded and uncomfortable of the Japanese
bunch. With its racer like twin- headlamp fairing, butt-in-the-air riding
position, afterthought pillion seat and a motor best suited to frantic
cog-swapping, the stock FZR is indeed a motorcycle that could make two-up
touring an emotional experience. But Signor Marconi loves a challenge, as he has
shown in his enthusiasm for the Tesi.The Bellaria uses the standard 599cc
16-valve FZR motor, adding a few horsepower - from a claimed 90bhp to about 95 -
by tweaking the bits on either side of it. The Yam's 32mm downdraught Mikunis
breathe through a big airbox that is fed via scoops in the front of the
all-enveloping bodywork, and the stock 4-1 pipe is replaced by a 4-2-1 of
Bimota's own design. Absence of fuel injection and EXUP leave plenty of
potential for midrange gains in the future; at the moment the serious power
starts arriving at 7000rpm.The motor hangs from a traditional Bimota twin-spar
chassis at the same 45-degree angle it takes up in the Yamaha.

The chassis
similarities end right there. The Bellaria's frame is made from real alloy,
unlike the Yamaha's painted steel, and its wheelbase is a mere 1375mm against
the Yam's 1420mm. When you consider that even Bimota's own 750-powered YB4 has a
wheelbase of 1400mm, and that Yamaha's tiny FZR400 is listed at 1407mm, you
start to appreciate just how miniscule the Bellaria is.Other figures too suggest
an ease of steering that becomes apparent on the move. Rake and trail are 22.5
degrees and 92mm respectively, the latter 2mm sharper than the cutthroat stock
FZR figure. Dry weight, at 359lb, undercuts the Yamaha by 35lb despite the
Bimota rarity of a hefty alloy rear sub frame carrying a pair of high-level
pillion pegs. (Potential passengers should be warned that this is no Gold Wing:
short legs, strong arms and stronger resolve are desirable.)Upside-down forks
may be a high-tech selling point for the likes of Suzuki, and even Ducati, in
some markets this year but by Bimota standards the high fashion of 1990 already
seems almost old hat. Marconi has gone on record to say that this will be the
last Bim he'll design with alloy-beam frame and conventional front suspension;
let's hope the Tesi works out and he's right.In the meantime, the Bellaria wears
a set of inverted teles from the house of Marzocchi. The GP men have been using
upside-downers for some time now with great success and the advantage of having
the thicker part of the leg at the top to take most strain, and the thinner bit
down below as unsprung weight, is enough to make you wonder why forks were not
designed this way in the first place.
The
Marzocchi's' only adjustment is a three-way compression damping knob at the top
of each leg. But this pre-production Bellaria needed some slightly more drastic
action because its front was too soft even on the highest setting, diving too
much under braking and even bottoming out every so often, apparently due to the
correct fork-oil level figure having been lost in the translation from the
Italian.A little more would doubtless have helped, and at least the Marzocchi's
gave none of the soft-forked standard FZR's misbehaviour under hard cornering,
but more compression damping and possibly even a stiffer spring might be needed
for heavyweight hooliganism - especially with a pillion on board. As it was,
though, the Bellaria was well-behaved one-up even over fast and quite bumpy
roads, once or twice flapping its front for an instant over 100mph-ish ripples
before settling. In slower bends the bike was even more impressive, somehow
absorbing minor road irregularities yet still giving plenty of feedback through
the 17-inch front wheel.
As a bonus, the soft front end and relatively
high-barred riding position (everything's relative with Bimota) helped give
wrists an easy time. It's to be hoped that those characteristics can be retained
when the forks are tuned to become progressively much firmer.Front brakes are
predictably wide 300mm discs gripped by four-piston Brembo calipers, backed up
by a 230mm disc at the rear.
The handlebar lever needed slightly more pressure
than I'd expected but there was plenty of feel, and a firm pull unleashed poke
a-plenty. Not that the chunky front Michelin Hi-Sport radial was ever troubled.
The stock FZR's Dunlop's are harsh, and the rear lets go a little early under
combat conditions. But even when assisted by a fistful of horses and well
cranked over, I couldn't catch out the much more compliant radials for grip.Some
of the credit for that goes to the rear Marzocchi, which with standard mid-way
settings gave a mix of comfort and control that was just about right for my 14
stone. Adding a passenger is bound to wreck the feel of any bike, but the
Bellaria at least has a remote compression damping adjuster with which the speed
that the Marzocchi is compressed over bumps can be varied through 30
close-spaced positions.The dial is tucked up on the rear sub frame, opposite a
similar knob for nine-way rebound damping and within reach if you don't mind a
few streaks of chain-lube up your arm from groveling around inside the bodywork.
Greater accessibility would be nice - and a remote preload adjuster, instead of
the normal collar, would be more useful still for two-up travel. There again,
perhaps it's as well not to give pillions too much encouragement to upset the
ride...One thing that would definitely be handy when heavily loaded is a bit
more midrange pull from the high-revving' four-pot motor, which drives cleanly
from down low but doesn't really start putting down power until seven grand.
The
Yamaha mill makes max power at 10,500rpm, redlines 2000rpm later and is happiest
when being kept on the boil with plenty of right wrist and much stirring of the
close-spaced six-speed gearbox.Not ideal characteristics for a sports-tourer,
but then the Bellaria is only anything of the sort when compared to its more
selfish single-seat sisters. An FZR1000-powered Bellaria would be sensational
but at heart this bike is still a small- bore scratcher. By Bimota standards it
is a delight around town - slim, soft and with surprisingly good steering lock.
On the open road it has to make up with lightness, buzziness and impeccable
steering what it loses to bigger bikes in out- and-out stomp.On top-end it will
be good for not far short of 150mph, though the last few will necessitate
getting well tucked-in behind the surprisingly protective bubble. Over-policed
freeways are by no means the ideal place for speed-testing but I saw well over
200 flick up on the digital Speedo; customers who attempt a similar figure on
their mph-calibrated units will probably be rewarded with either a severe pull
or a rod through the crankcases.
The electronic instrument console is a brave
touch but looks a bit like the sort of thing electronics whiz kids used to wire
up to their Z1000 Café-racers. Even bystanders who were dumbstruck by the
Bellaria's sleek lavender-blue lines didn't like it, and to make matters worse
the unit (admittedly pre- production) showed flashes of traditional Italian
temperament more suited to that country's soccer fields, first misbehaving and
then playing dead altogether.Worst of all, the digital Speedo proved harder to
read at a glance than a simple dial even when it was working properly. And
though water temp, mileage and fuel level are all displayed alongside, there is
no room for even the most basic digital clock.At least the tacho, a flickering
black bar along the top, is more readable, and other details are to Bimota's
impeccable standard. Mirrors are wide and clear, switches are Yamaha and
excellent, sculpting of alloy parts such as the headstock is predictably superb.
Paint and
fibreglass finish is as gorgeous as ever, too, though ham fisted attempts at
fairing replacement had already put cracks around a couple of boltholes.No owner
would commit such a crime, of course, simply because people in a position to lay
out around well over ten grand on a 600cc bike are not the sort to waste time
servicing - or even polishing - it themselves. Bimota customers have always been
a breed apart, people who want the best and can pay for it, and it's a fair
guess that few who choose the 600 will do so to reduce their insurance
premiums.In a way it is almost bound to be a disappointment, this Bimota: all
that money for a mere middleweight; all that unused chassis potential, capable
of harnessing half as much horsepower again. But for those who want a small
Bimota, a two-seat Bimota or who simply don't mind lashing out three times the
cost of an FZR600 for a taste of middleweight motorcycling perfection, the
Bellaria is something very special.

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