| MODEL | YAMAHA XSR 900 DB40 PROTOTYPE 2023 |
| Year | 2023 |
| Engine Type | 890 cc CP3 triple |
| Displacement / Capacity | 890 cc |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | — |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | Latest version of the Deltabox-style 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 one-off prototype built on the XSR900 to celebrate 40 years of Yamaha's Deltabox chassis, which debuted on the 1982 YZR500 Grand Prix bike. It was first shown climbing the hill at the 2023 Goodwood Festival of Speed, with former GP rider Niall Mackenzie scheduled to ride it. It is a showpiece rather than a production model.
