Bimota Tesi ID906

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Bimota Tesi ID906
Manufacturer
Production 20 units
Engine
Four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valves per cylinder
Compression ratio 10.4:1
Top Speed 225.3 km/h/ 140 mp/h
Ignition Electric
Transmission 6 Speed
Frame Pair of upside down boomerang shaped plates that envelope the engine on either side. They are made of aluminum 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.
Suspension Front: Swinging arm with Marzocchi single shock stepless preload 10-way compression and 25-way preload damping adjustment
Rear: Marzocchi single shock stepless preload 10-way compression and 25-way preload damping adjustment
Brakes Front: 2x 320mm discs 4 piston calipers
Rear: Single 230mm disc 1 piston caliper
Front Tire 120/70-17
Rear Tire 180/55-17
Weight 188 kg / 414.5 lbs (dry),
Fuel Capacity 16 Liters / 4.2 US gal
Manuals Service Manual


It could reach a top speed of 225.3 km/h/ 140 mp/h.

Engine[edit | edit source]

The engine was a Liquid cooled cooled Four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valves per cylinder. The engine featured a 10.4:1 compression ratio.

Chassis[edit | edit source]

It came with a 120/70-17 front tire and a 180/55-17 rear tire. Stopping was achieved via 2x 320mm discs 4 piston calipers in the front and a Single 230mm disc 1 piston caliper in the rear. The front suspension was a Swinging arm with Marzocchi single shock stepless preload 10-way compression and 25-way preload damping adjustment while the rear was equipped with a Marzocchi single shock stepless preload 10-way compression and 25-way preload damping adjustment. The Tesi ID906 was fitted with a 16 Liters / 4.2 US gal fuel tank. The bike weighed just 188 kg / 414.5 lbs.

Photos[edit | edit source]

Bimota Tesi ID906 Bimota Tesi ID906 Bimota Tesi ID906 Bimota Tesi ID906

Overview[edit | edit source]

Bimota Tesi ID 906








The second version of the Tesi was actually presented only a few weeks after the first. The only modification was engine displacement which was increased from 851 to 904. It was absolutely identical to the 1D 851 and was later to become known as the "SR". This was to cause confusion as the later "SR", which was different in both appearance and chassis.

The Bimota Tesi is one of the most radical, m extraordinary and most interesting superbikes ever built. With the Tesi, the small Italian factory took a giant leap forward in motorcycle design, one that only Yamaha (and to a lesser extent BMW) have dared to follow, although 'specials' builders such as Nico Bakker have produced similar machines in very' small numbers. What Bimota did was put into production a superbike that featured hub-centre steering rather than traditional telescopic front forks.

The problem with conventional telescopic forks is that they flex under braking and cornering, and because they compress under braking, the steering geometry of the bike is altered. In an ideal world the suspension and steering of a motorcycle should be separate and independent to each other. With telescopic forks this isn't possible, no matter how good the forks are, but with hub-centre steering the suspension can be separated from the steering.  So instead of wrapping the motorcycle's engine in a conventional frame and then bolting a pair of forks to the headstock and a rear swingarm to the back, Bimota have wrapped their chassis around the sides of the engine and then bolted a swingarm on at the front and at the back. The rear swingarm pivots in the traditional way and actuates the rear shock, while the front shock is bolted to the left-hand spar of the front swingarm and to the chassis. A complicated system of linkages joins the steering column to the front wheel to allow almost 30 degrees of steering movement. One of the advantages of using a twin-sided front swingarm (as opposed to a single-sided one like the Yamaha GTS 1000) is that it allows two brake discs to be used. And with twin 320mm front discs gripped by four-piston Brembo calipers, the Tesi has one of the best brake set-ups of any superbike.


The engine itself is a modified version of the Ducati 904cc water-cooled eight-valve dcsmo-dromic V-twin engine which uses a development of the Weber-Marelli fuel-injection system to produce a hefty 117bhp. If all this doesn't sound exotic enough, the whole bike is clad in carbon-fibre bodywork and equipped with a pair of Kevlar silencers. The finished result is a bike that scales a featherweight 4071bs dry and which has a whcelbasc more akin to a 400cc machine than a litre bike. On the road the Tcsi is quite unlike anything else. The lack of dive when slowing, and the fact that the suspension continues to work during hard braking, means that the Tesi can be braked later and cornered harder than anything else on the road. The fire-breathing Ducati engine means that top speeds of 160mph are a breeze and that in terms of performance the Tcsi will stay with the very best that Japan has to offer. The down side is that the Tesi is a solo machine, with no accommodation for pillion passengers, and it costs twice as much as a Yamaha GTS 1000. In fact, except for the Honda NR750, the Tesi is the most expensive production bike in the world. But then it is also arguably the best production bike in the world.

Source Super Bikes  by Mac McDiarmid


Make Model Bimota Tesi ID 904
Year 1991
Production 20 units
Engine Type Four stroke, 90°“L”twin cylinder, DOHC, desmodromic 4 valves per cylinder
Displacement 904 cc / 55.2 cub. in.
Bore X Stroke 92 x 68 mm
Compression 10.4:1
Cooling System Liquid cooled
Induction Weber fuel injection
Ignition Electric
Max Power 84.3 kW/ 113 hp @ 7500 rpm
Max Torque 92 Nm / 9.4 kgf-m / 67.9 lb-ft. @ 7000 rpm
Transmission 6 Speed
Final Drive Chain
Frame Pair of upside down boomerang shaped plates that envelope the engine on either side. They are made of aluminum 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 4 piston calipers
Rear Brakes Single 230mm disc 1 piston caliper
Front Tire 120/70-17
Rear Tire 180/55-17
Dry Weight 188 kg / 414.5 lbs
Fuel Capacity 16 Liters / 4.2 US gal
Consumption Average 7.4 l/100 km / 32 mpg
Top Speed 225.3 km/h/ 140 mp/h
Road Test Motociclismo 1991 Motosprint 1991