2017 · Enduro · Buyer's Guide
Two-Stroke Trail Assassin
This is KTM in its purest, least diluted form: a 249 cc liquid-cooled single making 45 hp and 27 lb-ft in a chassis that weighs almost nothing under you. The chromoly steel frame and WP Xplor fork give it a planted, honest feel instead of the nervous twitch you might expect from something this light. Fully adjustable suspension front and rear, 11.8 in (300 mm) of travel up front, 12.2 in (310 mm) at the rear, 14.6 in (370 mm) of ground clearance. Nothing here is styling. Every number on the spec sheet exists to get you through terrain that stops other bikes.
It rides like a tool built by people who race. The power comes on hard and rewards a rider who commits, and the 58.3 in wheelbase with a 21-inch front lets you change your line whenever you want. Ruggedness is genuinely high, and the aftermarket support means a well-kept example stays current for years. The caveat is honest and short: at 37.8 in (960 mm) the seat is tall, the 2.5 gal (9.5 L) tank keeps rides in half-day chunks, and there are no electronic aids at all. Your right wrist is the traction control.
Spec sheets don't ride bikes, but they set the baseline.
| Power | 45 hp (33 kW) |
|---|---|
| Torque | 27 lb-ft (37 Nm) |
| Displacement | 249 cc |
| Engine | Single-cylinder |
| Cooling | Liquid-cooled |
| Gearbox | 6-speed |
| Final drive | Chain |
| Fork | Upside-down (USD) |
| Front brake | 260 mm |
| Front tire | 90/90-21 |
| Rear tire | 140/80-18 |
| Wheelbase | 58.3 in (1480 mm) |
| Ground clearance | 14.6 in (370 mm) |
| Front travel | 11.8 in (300 mm) |
| Rear travel | 12.2 in (310 mm) |
| Seat height | 37.8 in (960 mm) |
| Fuel capacity | 2.5 gal (9.5 L) |
Equipment check
Chassis
What follows isn't my own lap time. It's what riders have told me over the years: paddock talk between motos, conversations with owners at club nights, and the messages and emails that land in my inbox after a hard season. On the 250 EXC the chatter is unusually consistent. People talk about the engine first, and almost everything else second.
The theme that repeats most is the top end. Riders describe a rush high in the rev range that makes open ground disappear, and they say it pays back a rider who stays committed rather than one who feathers it. Alongside that, owners mention how cleanly the motor runs when the going turns technical, and how settled the bike feels once they've picked a line. Comfort comes up more often than most people expect from a competition tool, with riders pointing to the seat and the way vibration is kept in check. Reports of trail-side trouble are rare in what reaches me.
The one gripe that recurs is fork rebound. A number of testers find the damping too strong for their liking, and they describe it as a harsh feel over repeated hits, with lighter riders in particular reporting less compliance than they want.
Where this KTM 250 EXC pulls ahead of — or falls behind — its rivals on the numbers, and the typical bike in its class on character.
Power
Torque
Displacement
Seat height
Forget spec-sheet bragging. Here's who the 250 EXC is actually built for.
This is your bike. Light, tall, fully adjustable and built for the sections where skill matters more than power. Plan fuel stops carefully, because 2.5 gal (9.5 L) does not cover a long desert day.
Made for Bar M / Kane Creek · Imperial Sand Dunes · Johnson Valley OHV Area
Track capability is genuinely there and the power delivery rewards commitment. It is built for enduro terrain first, so treat MX days as a bonus rather than the reason you buy it.
Made for Carnegie State Vehicular Recreation Area · Fox Raceway at Pala · Glen Helen Raceway
Straight answer: this is the wrong tool for multi-day route work. No luggage mounts, a 2.5 gal (9.5 L) tank and a 37.8 in seat make logistics painful on anything longer than a day.
Made for AZBDR — Arizona Backcountry Discovery Route · California BDR South · COBDR — Colorado Backcountry Discovery Route
If you're cross-shopping the older generation, here's what changed.
Previous generation · 2011–2016
Race-Bred Two-Stroke Dirt Weapon
Compare to the previous model →If this one isn't quite the fit, these are the bikes worth riding back-to-back against it.
Any price note compares both bikes at the same age — the youngest age both have on the used market — against this KTM 250 EXC. “cheaper/pricier” is what that bike costs second-hand, not how worn it is.
Successor · 2018–2022
Fuel Injection Changes Everything
Successor · 2018–2022
Injected Two-Stroke Sixdays Weapon
Competitor · 2012–2020
Bulletproof Flick Machine
Roughly $2,200 cheaper used than this bike at 9 yr
Same Platform · 2025
The Two-Stroke Factory Weapon