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CR&S Vun Britten Tribute

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Make Model

CR&S Vun Britten tribute

Engine

Rotax, four stoke, single cylinder, DOHC, 4 valves per cylinder

Capacity

652 cc / 39.79 cu-in
Bore x Stroke 100 x 83 mm
Cooling System Liquid cooled
Compression Ratio 9.7;1
Lubrication Dry sump
Exhaust Stainless steel catalytic exhaust system (CR and S by QD)

Induction

Injection. Integrated CR and S/Walbro/Dell’Orto ignition/injection system, 52 mm throttle housing, twin injectors, twin spark

Ignition 

Marelli integrated electronic, twin spark 
Starting Electric

Max Power

54 hp / 40 kW @ 7000 rpm

Max Torque

6 kgf-m / 58.9 Nm @ 5000 rpm
Clutch Wet multiplate

Transmission 

5 Speed
Final Drive With “O” ring chain
Frame Steel tubes and machined light alloy plates compound

Front Suspension

46mm Telescopic forks
Front Wheel Travel 120 mm / 4.7 in

Rear Suspension

Oscillating swingarm, single shock absorber
Rear Wheel Travel 128 mm / 5.0 in

Front Brakes

Single 320mm disc

Rear Brakes

Single 220mm disc

Front Tyre

120/70 ZR17

Rear Tyre

160/60 ZR-17
Dimensions Length 1980 mm / 78.0 in
Width     740 mm / 29.1 in
Wheelbase 1386 mm / 54.5 in
Seat Height 800 mm / 31.4 in
Ground Clearance 150 mm / 5.9 in

Dry Weight

135 kg / 297.6 LBS

Fuel Capacity

12,5 Litres / 3.3 US gal

Based in Italy, CR&S (Café Racers and Specials) are doing what Italians do best – building whacky motorcycles that look and feel a bit special. The spec is not that impressive – the Vun is powered by a 4-valve, DOHC, 652cc, single-cylinder, liquid-cooled Bombardier-Rotax engine that makes a mere 54 horsepower. But since the bike only weighs 135kg dry, performance is entertaining.  For those who think 54bhp may be a bit much, there’s also an ‘underpowered’ 29bhp version (that’s what the factory website says it is!) available, as is a 68bhp racing version, which is for track use only. All versions of the Vun are, however, fitted with a steel-tube chassis, Ceriani 46mm front forks, adjustable Paioli monoshock rear suspension and 320mm single-disc brakes at the front.

The Vun is designed with minimum weight in mind, to this end the bike uses an underslung exhaust as used on Buell bikes.
One of the main advantages of this design is that it keeps weight low down and lowers the center of gravity a vital component of good handling.

CR&S is a small company of around ten individuals. Roberto Crepaldi, one of the company's cofounders was a close friend of John Britten, a man who created one of the most radical bikes of the century the Britten V1000. The Vun pays homage to this visionary who died in 1995.

Source CR&S