2015–2016 · Supersport · Buyer's Guide
Light, Nimble, Genuinely Cheap
Kawasaki built the Ninja 250 SL around a single idea: take the mass out and let everything else follow. A 249 cc liquid-cooled single makes 28 hp at 9,700 rpm and 17 lb-ft at 8,200 rpm, fed through a six-speed box and a chain. At 335 lb wet it is one of the slimmest fully faired sportbikes you can throw a leg over, and the chassis, not the engine, is the headline. Steering effort is close to nothing and lean clearance is generous. What you do not get is an electronics package. No ride modes, no IMU, and ABS was an option on this trim rather than fitted equipment.
It ages the way simple machines do. Fuel economy sits at 64 mpg, consumables are small and cheap, and there is a deep pool of parts to personalize it with, so running one costs very little over a season. This bike is for the rider who values carrying speed through tight, technical roads and threading city traffic more than winning a roll-on. The honest caveat: 28 hp runs thin once the road opens up, freeway merges take planning, and the fork is fixed with no preload, compression, or rebound to dial in. Only the rear shock takes preload.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 28 hp (21 kW) @ 9,700 rpm |
|---|---|
| Torque | 17 lb-ft (23 Nm) @ 8,200 rpm |
| Displacement | 249 cc |
| Engine | Single-cylinder |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Fork | Telescopic |
| Front brake | 290 mm |
| Front tire | 100/80-17 |
| Rear tire | 130/70-17 |
| Seat height | 30.7 in (780 mm) |
| Wet weight | 335 lb (152 kg) |
| Fuel capacity | 2.9 gal (11 L) |
| Fuel economy | 64 mpg (US) |
Equipment check
Chassis
Safety
Nils has been collecting notes on this bike the slow way: talking to owners at paddocks and club nights, listening to what riders say when they park up together, and reading the messages that land in his inbox from people who actually put miles on one. Over the years the chatter on the Ninja 250 SL has settled into a clear shape. Riders talk about it as a cheap, light, mechanically sound bike that gives back more than its price suggests, and they are equally candid about where the ride gets rough and where the engine runs out of things to say.
Two things dominate the conversation. The first is the drivetrain: riders consistently describe the six-speed box as faultless in normal use, and they note how smooth the single feels compared to what they expected from that layout. The second is money. Owners who cross-shopped it against pricier machinery keep pointing out that they got real sportbike looks and a chassis they trust for an entry-level outlay, and the running costs stay small season after season. Reliability comes up almost as often. People who have lived with one report solid switchgear, a dash that holds up, and finish that survives, with very little going wrong along the way. Then there is the way it rides. Riders describe it as genuinely fun on twisty roads, light enough to change direction with almost nothing from the bars, narrow enough to slip through traffic, and direct in the feedback it sends back when they push.
The suspension draws the most consistent grumbling. Riders find the setup firm enough for sporty use, but on broken surfaces it goes harsh and skips instead of settling. Wind protection is the other recurring complaint. Owners say the screen looks the part and does very little at higher speeds, which wears on them over longer stretches. Some riders mention the missing gear position readout on an otherwise tidy dash. A few report that the engine feels punchy through the middle and then flattens off, with nothing much waiting at the top of the rev range.
Sticky neutral selection
Some testers noted that the transmission can be reluctant to engage neutral from first gear, often jumping to second instead. This appears to be an inherent design quirk rather than a fault, requiring a delicate touch at the lever.
Where this Kawasaki Ninja 250 SL 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
Seat height
Forget spec-sheet bragging. Here's who the Ninja 250 SL is actually built for.
In the tight, technical sections you will keep good company and enjoy every one of them. On the fast, open stretches of a canyon run, 28 hp means you get waved past and have to be fine with that.
Made for Angeles Crest Highway · Coronado Trail / US 191 · Highway 1 / Big Sur
This is the sharpest tool here for you. Low mass and instant direction changes let you work on line, entry speed and body position instead of managing power out of every corner.
Made for Back of the Dragon · Blue Ridge Parkway · Cherohala Skyway
The twisty part of the weekend suits it perfectly and 64 mpg keeps fuel stops rare. The long highway slab getting out of Austin or San Antonio is the part you will not enjoy.
Made for Austin / Texas Hill Country · Twisted Sisters · Austin / Handbuilt Motorcycle Show
If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
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