The Ipotesi (Hypothesis) was a motorcycle presented as a styling exercise and was introduced at the Milam Motorcycle Show in November 1973. The design was penned by Giorgio Giugiaro, and was based on an strong horizontal lines and very angular shapes. The egine was based on the previous 350 twin with electronic ignition, but it looked completely updated due to the squarish outer casings. Cast alloy wheels and disc brakes completed this extremely modern looking motorcycle. It was produced from 1975, unti 1977.

Engine: Technical Specification (1975)

Cylinders / Cycle: twin / 4-stroke
Displacement: 348,9 cc
Bore x stroke: 63 x 56 mm x 2
Compression ratio: 9.2:1
Power / rpm: 27 HP / 7,600
Torque / rpm: NA
Cooling: air
Distribution: pushrod
Carburettor: 24 mm carburettor x 2
Ignition: electronic
Lubrication: wet sump
Starting: kickstart
Primary drive: gear
Clutch: wet multiple plate clutch
Gearbox: 5 speeds
Final drive: shaft


Frame: single beam tubular and pressed steel frame
Front suspension: telescopic hydraulic fork
Rear suspension: swingarm with mechanical shocks
Front brake: double 230 mm discs
Rear brake: 200 mm drum
Front tire: 2.75 x18”
Rear tire: 3.25 x18”
Wheels: alloy
Tank: 19 litres
Length: 1970 mm
Width: 620 mm
Wheelbase: 1310 mm
Weight: 160 Kg

Performance: 160 kph