The X 250th is a 30-unit track special celebrating 250 years of American independence, with 25 bikes earmarked for the US and a 'Stars and Stripes'…
| MODEL | APRILIA RSV4 X 250TH LIMITED EDITION 2026 |
| Year | 2026 |
| Engine Type | Four stroke, longitudinal 65° V4, DOHC, 4 valves per cylinder, raised compression ratio |
| Displacement / Capacity | 1099 cc / 67 cu in |
| Bore X Stroke | 81 x 53.32 mm |
| Compression Ratio | — |
| Cooling System | Liquid cooled |
| Max Power | 176.5 kW / 240 hp @ 13750 rpm |
| Max Torque | 131 Nm / 96.6 lb-ft @ 11750 rpm |
| Ignition | — |
| Induction | MY25 throttle bodies with dedicated intake trumpets, Sprint Filter racing air filter |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | STM dry clutch |
| Final Drive | Chain, Regina 520; PBR titanium rear sprocket and lightened front sprocket |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Öhlins FKR pressurised-cartridge fork, mechanically adjustable preload, compression and rebound; CNC fork bottoms with 108 mm caliper mounts |
| Rear Suspension | Öhlins TTX MotoGP-derived piggyback monoshock, fully adjustable for preload, ride height, compression and rebound |
| Front Brakes | 2 x 340 mm Brembo carbon-carbon discs, carbon pads, billet aluminium finned calipers (MotoGP configuration) |
| Rear Brakes | Nickel-plated caliper |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 165 kg / 364 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | Pirelli Diablo Superbike slick 125/70-17 (SC1) |
| Rear Tyre | Pirelli Diablo Superbike slick 200/65-17 (SCX) |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
The X 250th is a 30-unit track special celebrating 250 years of American independence, with 25 bikes earmarked for the US and a 'Stars and Stripes' livery. It is the sixth model in Aprilia's X series and builds on the X-GP formula, but goes further with Brembo carbon-carbon brakes, which Aprilia says are a first on a bike sold to the public. The race-spec V4 makes a claimed 240 hp, and the bike sold out within about two weeks at roughly $150,000.
