|
Make Model |
Bimota Tesi ID 906SR |
|
Year |
1992 (production 164) |
|
Engine |
Liquid cooled, four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valves
per cylinder |
|
Capacity |
904 |
|
Bore x Stroke |
92 x 68 mm |
|
Compression Ratio |
10.4:1 |
|
Induction |
Weber Fuel injection |
|
Ignition /
Starting |
- / electric |
|
Max Power |
113 hp @ 8500 rpm
(rear tyre 98.2 hp @ 9700 rpm) |
|
Max Torque |
8.7 kg-m @ 8000 rpm |
|
Transmission /
Drive |
6 Speed / chain |
|
Frame |
Pair of upside down
boomerang shaped plates that envelope the engine on either side. They are
made of aluminium alloy and are machined not cast. The engine, unlike the
preceding series, has no load bearing functions. At the far ends of the
engine are the hinged swing arms, made of anticordal alloy. |
|
Front Suspension |
Swinging arm with Marzocchi single shock
stepless preload 10-way compression and 25-way preload damping adjustment |
|
Rear Suspension |
Marzocchi single shock stepless preload
10-way compression and 25-way preload damping adjustment |
|
Front Brakes |
2x 320mm discs |
|
Rear Brakes |
Single 245mm disc 1 piston calipers |
|
Front Tyre |
120/70-17 |
|
Rear Tyre |
180/55-17 |
|
Dry-Weight |
188 kg |
|
Fuel Capacity |
16 Litres |
|
Consumption average |
17.1 km/lit |
|
Braking 60 - 0 / 100 - 0 |
11.9 m / 34.0 m |
|
Standing
¼ Mile |
10.9 sec / 202.2 km/h |
|
Top Speed |
248.8 km/h |

THE TESI ISN'T a motorcycle, it's a party political
broadcast by the Monster Raving Loony Party. If the Jap manufacturers are the
Conservative grey men in suits trotting out the same party line year after
year (in between getting caught with their pants down), then Bimota now,
now, Sir Robin, let me finish — are definitely on the political fringe.
They're the oddballs. The only ones showing there can be a different, more
radical way... even if they do charge silly money for the privilege. And the
Tesi is their most different, radical and expensive party statement yet.
Like Honda's corporate jerk-off, one-off NR, the Tesi is
Bimota's technological masterpiece (the first production motorcycle with
hub-centre steering); their exercise in excess (it has an overbored,
fuel-injected Ducati engine too); their gizmo overkill (a boggling, space-age,
LCD instrument console). Like the NR it seems like a 'we-can-do-this-you-can't
— na, na, na-na na' irrelevence. Like the oval-pisto-ned wonder there are only
a handful of Tesis in existence. Like the NR, each costs as much as a small
house.
But there are two crucial differences. Ultimately the NR is a
Honda, while the Tesi is a Bimota, an Italian jewel, a Lamborghini of bikes.
Ultimately, oval pistons are an unnecessary dead-end street, borne of racing
regulations; hub-centre steering, if maybe not in this form, if maybe only for
sports bikes, is the way of the future.
If you've never seen a Bimota in the flesh you're missing out.
They manage to be stupendous and stupid all at once. That rear end: stupendous. Marchesini magnesium, three-spoked, pearl
white painted wheel; ultra low-profile, ultra wide 180-section Michelin radial
rubber; beautifully-crafted aluminium swing-arm; immaculately sculpted hanger
plates. But stupid too? Yes. The indicators are so-faired that, side-on, you
can't see them.
OK then, a better example: the console/ 'bar area. Stupendous?
Fully-adjustable, polished aluminium clip-ons; an LCD digital console with
Battlestar Galactica readouts for mph, rpm, mileage, trip, water temp, and
remaining fuel; plus that delicious filler cap. So how stupid?
I'll tell you how. LCDs? Think about it. Italians are bad
enough at electrics so gawd help their electronics. Would you buy a Ninetendo
Game Boy if it was made in, say, Bologna? These have probably come out of a
Zanussi washing machine. At the first whiff of a cleaning sponge the speedo
went completely monster raving loony: 546mph, 728mph, 371 mph; the mileom-'
eter accumulated 400 miles in 40 minutes and my precious mpg figures went to
pot. At the first onset of dusk the illuminated figures looked about as bright
as Pete Beale on a Sunday morning. While the fuel gauge (which you need to
keep an eye on 'cos there's no reserve tap and the tank's only good for around
90 miles) is simply impossible to read ALL the time — unless you stand on the
pegs — because it's hidden behind the right clip-on.
Worse. Because it's Ducati-powered, a goodly assortment of the
Tesi's ancilliaries are Ducati too. Actually, hang that, make it a motley
assortment. The idiot lights are in suitably idiotic place on the front of the
tank. Wear a full-face and you can't see them unless you're looking down the
filler. The switchgear: Ducati. The indicators aren't self-cancelling, which
wouldn't annoy very much if you could see the idiot lights. And because it's
Ducati-powered the clutch is heavy and it's damn awkward to find neutral at
standstill. But that wouldn't matter very much if you could see the erratic
neutral light.
I wish that was the last of my niggly little gripes, but it
isn't. The headlight's not bad but, let's face it, I've seen prettier
contraptions on a Wartburg. Use it too often or leave it on for a little while
and you'll find the battery discharges quicker than a 18-year-old after eight
pints of lager and black. Because there's no sidestand cut-out switch, the
sidestand is spring-loaded. Which, oh dear, could be expensive. The body panels on our test bike did
not fit well. The silencers melted my boots when on tippy-toes and there's not
much steering lock. The mirrors are useless.
You might be starting to sense that I'm disappointed, that the
Bimota experience, in this case, isn't all it's cracked up to be. And up to a
point I am: too many irritating, unnecessary niggles. I was reminded of the
lust and loathing the incomplete Norton Fl engenders. Like that, the Tesi allures, excels and is
exquisite, but it also sometimes annoys and frustratingly dissappoints. The
crucial difference between the two, despite the impression the catalogue of
narks above may give, is that the Bimota does it less often. Much less often.
The Norton has a Yamaha key with the Yamaha bit scrubbed off. The Bimota has a
pukka Bimota key. The Norton has horrid welding here and there, such as the
exhaust hanger plate, the Bim has beautiful, one off cast aluminium items. And
it's these small details that make all the difference.
And following that party political broadcast by the Miserable
Jealous Bastard Party, here's the real news: the Tesi works.
It's a weird sensation riding a bike when you know there's no
direct connection between the 'bars and the front wheel. At first it's purely
psychological. A matter of confidence, of trust in something unfamiliar. You
expect it to be fundamentally different — and it is, but not as much, or in
the same ways you might expect.

You expect the steering to be, y'know, different. But, bar an
extreme lack of lock when three-pointing about around town, it isn't. In
theory, all those rose joints and tic
rods in the linkage should translate into either heavy
stiction (on a new bike) or vague slackness on one with a good few miles under
its belt. Really, it's like a car. People will get used to the idea that this
sort of steering, like everything else, needs maintenance. But with our test
bike, even though the steering head was noticeably loose at standstill and on
the move in a straight line the bars could be nudged marginally without any
effect, it never seemed to be a problem.
Only above 125 did a true cause for concern raise its ugly
head. At those speeds (and with the 906 engine, the Tesi's good for around
150) the front becomes unnervingly light and a tankslapper threatens to
develop. Others have commented on it before and I, along with designers who
know far more about this sort of thing, am convinced the frontal aerodynamics
are awry. What's more, over ultra-fast rises which lift the front wheel, it
seemed the wind was catching under the headlamp and almost threatening to loop
the bike. I'm speculating rather, but there is definitely something wrong.
Then again, I don't imagine many will be ridden at that sort of lick too
often.
The counterpoint, of course, is how the Tesi excels on the
brakes. Because the braking forces don't travel through the suspension,
there's virtually no dive, no need for extraneous suspension travel and no
conventional braking sensation either. It takes a while to get used to. On the
one hand, because the suspension's softer, with less travel, the Marzocchi
shock transforms average roads into a surface akin to Don-ington Park and
pot-holed ones into a harsh, bottoming out, jarring nightmare. On the other,
braking hard feels little different from braking gently. A single finger on
the massively-massive front Brembos provokes a little dip at the front, a
slight raise at the rear and you're left watching the deceleration of the
roadside furniture to try to work out how much you've slowed.
Really. There's none of the shoulder-tightening,
arm-compressing exertion you normally (but now I realise, subconsciously) use to gauge braking. Instead you learn, slowly at
first, to fine tune your senses, totally ignore all previous braking markers
and concentrate more and more on synchronising your downshifts and use of the
rear brake. It stops, truly, like a two-wheeled car. A two-wheeled car with
massive brakes, plenty of rubber and the weight of your average 600.
Once you've discovered this unique adroitness, the Tesi riding
experience becomes focussed towards exploiting it your new skill to the
full. Things start coming together. The riding position I initially thought
cramped, pegs stubby and high, clip-ons low and close, seat wide and
sparsely-padded, became compact and perfectly suited to the task. The booming,
overbored Ducati engine, which at first seemed at odds with the sleek
high-tech sheen of the Tesi's aluminium chassis, now became the ideal motive
force to: a) get the low-down drive out of those newly squa-red-off corners b)
get the most out of the Tesi's well balanced, low C of G chuck-ability and c)
get all the proles looking at you in the first place.
Suddenly I'd discovered the Tesi's elusive star quality. I
started thinking daft thoughts about whether "...in the right conditions, on
the right day, on the right road, maybe this is this quickest thing about." I
started forgetting about all those unnecessary foibles I carped on about at
the beginning. And, for a couple of all too brief, superlative-laden rides I
didn't give a moment's thought to the Tesi's price. 'Cos I had it for a few
days more. It was mine and everything else was irrelevent.
In a sense it still is. For those who can afford it the price
is largely irrelevent. It doesn't really matter what else they could buy with
their £26,000 because ultimately, this a Bimota, nothing else is the same and
that is what it costs. Call it the Lamborghini syndrome. If you need to know
the price, you can't afford it.
For the rest of us, the Tesi, at that price, might seem
irrelevent too. "OK," you might think. "So they've built it, it works (up to a
point), but so what?"
The 'so what' is that like Monster Raving
Loonies everywhere, Bimota might not have, or even want,
popular success, but they have proved their point. Hub-centre steering production hub-centre steering — works; the Tesi displays enough
potential to convince that this is the way of the future (speculation over
Yamaha's forthcoming hub-centreEXUP continues). And even if Bimota's design is
compromised by an overly-complicated linkage, they were the first, the Tesi
remains unique and that is what you're getting for your £26,000. Ijust wish
they hadn't gimmicky-fied it with that LCD malarkey. \3