2017–2026 · Naked Bike · Buyer's Guide
Big-Bike Soul, 125cc Body
Aprilia built the Tuono 125 to look and feel like its V4 namesake shrunk to legal size, and the surface holds up under scrutiny. The 124 cc liquid-cooled single spins to 15 hp at 10,750 rpm, so it rewards a rider who keeps it above 7,000 and lets it breathe. Underneath sits the same aluminum beam frame and upside-down fork that carry the RS125 sibling, plus standard ABS. That hardware is why this bike sits at the sharp end of the 125 class instead of the budget middle. It reads as a real motorcycle, not a scaled-down toy.
On the road it stays composed the way bigger bikes do. The chassis turns in cleanly and holds a line without getting nervous, and the delivery is smooth and predictable rather than raw and violent. It ages well too, because the build quality is honest at every contact point and running costs stay low near 87 mpg. This is a bike for a newer or lighter rider who wants genuine cornering feel, or an experienced hand who values finesse over outright speed. The honest caveat: top speed lands at 68 mph, so it is a back-road and city tool, never a highway cruiser.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 15 hp (11 kW) @ 10,750 rpm |
|---|---|
| Torque | 9 lb-ft (12 Nm) |
| Displacement | 124 cc |
| Engine | Single-cylinder |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Fork | Upside-down (USD) |
| Front tire | 110/70-17 |
| Rear tire | 130/70-17 |
| Seat height | 31.9 in (810 mm) |
| Wet weight | 295 lb (134 kg) |
| Fuel capacity | 3.8 gal (14.5 L) |
| Top speed | 68 mph (110 km/h) |
| Fuel economy | 87 mpg (US) |
Equipment check
Safety
Swing a leg over and the fit argues full-size immediately. The bars are wide, the seat and pegs put you in a natural, ready position, and every control lands exactly where your hand goes looking for it. Shift and the gearbox answers with a clean, precise click every time. Roll on and the mechanical note stays honest, with no cheap chatter or buzzy harshness coming up through the pegs and bars. Nothing on the bike rattles or telegraphs a cut corner. Lean it over and the Mitas rubber stays planted and buttery, with enough ground clearance that dragging a knee never felt like a stretch. The front brake and its ABS haul it down consistently and work with the chassis instead of against it.
My own 0–100 score for this bike against the class, area by area — the marker on each bar is the class average.
Point it into a bend and the front reads like something off a far bigger machine. It's precise and keen to change direction without ever going nervous under me, and I could lean on the chassis harder than a 125 has any right to take. The fork isn't cut to a price either, so there's genuine reserve left when I push. And the rubber holds with a planted, confident bite that most small bikes never get anywhere near.
What steadies my confidence is how tightly the whole thing is screwed together. Every fastener, panel gap, and contact point looks and feels deliberate, put there by people who cared rather than a line rushing to hit a number. Nothing rattles, nothing buzzes loose, nothing hints at a corner quietly cut. That's usually the tell that a bike will stay honest through the miles and age with some grace instead of loosening up on me.
The brakes get on with the job quietly. There's ABS at the front, and the stoppers stay consistent no matter how many times I lean on them through a day. Best of all is the way they cooperate with the chassis instead of upsetting it, so I can bleed pressure toward an apex and the bike settles rather than pushing back at me. On a machine this small, that kind of composure isn't something I take for granted.
Settle into it and nothing signals a small bike. The bars are wide, the seat and pegs set a natural, ready posture, and my hands found every control right where they reached for it. I never sat there fidgeting to get comfortable or counting off the miles. The gearbox belongs in that same conversation, answering each shift with a clean, precise action. It reads full-size from the first mile, which is rare this far down the range.
Ask what a small single should feel like and this one keeps answering above its class. The throttle is metered and mature, clean off idle and clean at full stretch, with none of the buzzy harshness I usually brace for. The honest trade is intensity. It runs calmer than the strokers it succeeded, which snapped with more venom, so a rider raised on that raw hit will notice the missing edge. In return I get delivery I can trust and none of the old seized-top-end grief.
This isn't my own lap of a test loop. It's what riders have told me over the years: the threads they start, talk at the track, and the notes in my inbox. Line up enough Tuono 125 owners and the picture repeats: a small machine that carries itself like a bigger one, with the sharpest gripes aimed at a few factory parts.
The engine draws the most comment. It thrives on revs and pays back a willing rider with lively acceleration. Handling earns the same praise, a bike that tips into a corner easily and stays settled. Taller riders like the roomy, upright seating on long days. The front brake and its ABS get credit for secure stops, and many say the sharp styling and finish read like a larger machine.
The gripes run narrow. The standard tires top the list, faulted for thin grip and feel and swapped out early, the wet making the case louder. The suspension draws a similar note, with nothing to adjust at either end and a soft feel once the pace climbs. A smaller group flags the stock exhaust for corroding through sooner than it should, a costly fix on a bike this size.
Exhaust holing/corrosion
The stock exhaust system is prone to rusting through, often requiring a complete replacement. This is a known weak point, exacerbated by wet conditions and insufficient care.
Gearbox damage from quickshifter
When the optional quickshifter is fitted, the 125cc gearbox can develop serious issues, including jumping out of gear under acceleration. The additional stress is believed to overburden the lightweight transmission.
Where this Aprilia Tuono 125 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 Tuono 125 is actually built for.
Your Skyline and Alice's weekends plus the city commute fit this bike perfectly: light, sharp through the ridge-road corners, and genuinely good-looking. It stays fun at legal pace and keeps you out of license trouble.
Made for Bay Area Ridge Roads · San Francisco / Bay Area · Skyline Boulevard / Alice's Restaurant
You'll love the corner-entry precision and grippy tires on the tighter canyon sections. But with 15 hp and a 68 mph top end, the fast, open stretches of Angeles Crest will leave you wanting more.
Made for Angeles Crest Highway · Coronado Trail / US 191 · Highway 1 / Big Sur
Tail of the Dragon rewards technique over speed, and that's exactly this bike's game: light, precise, forgiving, and cheap to run for repeat weekend laps. The long highway slog to get there is the only real hitch.
Made for Back of the Dragon · Blue Ridge Parkway · Cherohala Skyway