2025–2026 · Supersport · Buyer's Guide
MotoGP Looks, Learner License
The RS 125 GP Replica is a small sportbike built with the same seriousness as Aprilia's big ones. It uses an aluminum twin-spar frame, full fairing bodywork in the RS-GP25 race livery, and a liquid-cooled 124 cc single making 15 hp at 10,500 rpm with 8 lb-ft of torque. The 6-speed gearbox has a quickshifter for clutchless upshifts and downshifts, and ABS and traction control are both standard. Very few bikes this size come with that kind of hardware. The styling is sharp and the design has real character. It looks like a factory racer that shrank, and that matters to the rider it's aimed at.
On the road, what defines it is lightness. At 317 lb (144 kg) wet it steers with almost no effort, it has plenty of lean clearance, and it's easy to thread through traffic. It stays calm at the top of its speed range. It's cheap to run, too, and it works well for a new rider who wants to learn proper sport-riding technique on a bike that forgives mistakes. The limits are honest ones. 15 hp is 15 hp, top speed is 80 mph (129 km/h), and neither the fork nor the shock can be adjusted. Treat it as a school for corners, not as a way to cover distance.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 15 hp (11 kW) @ 10,500 rpm |
|---|---|
| Torque | 8 lb-ft (12 Nm) @ 8,500 rpm |
| Displacement | 124 cc |
| Engine | Single-cylinder |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Front brake | 300 mm |
| Front tire | 100/80-17 |
| Rear tire | 130/70-17 |
| Seat height | 32.3 in (820 mm) |
| Wet weight | 317 lb (144 kg) |
| Fuel capacity | 3.8 gal (14.5 L) |
| Top speed | 80 mph (129 km/h) |
Equipment check
Drivetrain
Lighting
Safety
Over the years I've heard a lot about this little Aprilia: in the paddock, on club nights, in chats with owners and in the messages riders send me directly. The pattern is consistent. Owners love the looks, the equipment and the way it corners, and their gripes center on the bottom end and the gearing.
The styling comes up first and most often. Owners call it the most convincing race replica in the 125 class, and they single out the single-seat tail and the LED triple headlight. Riders also say again and again that the quickshifter, switchable traction control and dual-channel ABS feel like equipment from a far bigger machine. The frame gets the same kind of praise for how it rewards spirited riding on twisty roads. Owners who keep the single above 10,000 rpm add that it sounds genuinely racy.
Some owners think traction control is close to redundant with this little power, though they point out it can be switched off. A few individual riders raise two gearing points. Below 6,000 rpm the engine feels sluggish, so traffic and uphill stretches mean constant downshifts. First gear is so short that the limiter arrives almost at once, which forces an instant shift into second to avoid the power cut.
Where this Aprilia RS 125 GP Replica pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Wet weight
Top speed
Seat height
Forget spec-sheet bragging. Here's who the RS 125 GP Replica is actually built for.
The twisty ranch roads suit it perfectly, but the interstate run out of Austin or San Antonio at an 80 mph ceiling won't. It's great for local loops and a poor fit for weekend road trips.
Made for Austin / Texas Hill Country · Texas Hill Country BDR-X · Twisted Sisters
It's a sharp tool for tight canyon sections and learning to hold corner speed. An experienced rider will run out of power fast on the open stretches of the Crest, though. Buy it to train on, not to lead the group.
Made for Angeles Crest Highway · Coronado Trail / US 191 · Highway 1 / Big Sur
If you ride the Dragon to work on your technique, this is the best match of the three. It's light, eager and forgiving in tight bends. Just trailer it or pick back roads for the trip out from Atlanta or Charlotte.
Made for Tail of the Dragon · Back of the Dragon · Blue Ridge Parkway
If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
