| MODEL | GILERA 850 TWIN PROTOTYPE 2002 |
| Year | 2002 |
| Engine Type | — |
| Displacement / Capacity | 839 cc |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | — |
| Max Power | Up to 110 hp (estimated, at rear wheel) |
| Max Torque | — |
| Ignition | — |
| Induction | Fuel injection |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
A 2002 development prototype of a Piaggio-designed 839 cc twin intended for a future Gilera naked bike. Testers fitted it in a Cagiva Raptor 650 chassis and reported strong mid-range pull; it was meant to sit above the 600 supersport.
