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CR&S Vun Britten Tribute

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