Enduro · Two stroke

KTM 250 EXC

The 250 two stroke enduro bike. Lighter and snappier than the 300, registrable, electric start, and fuel injected since 2018. Sold in Australia from 1990 to 2023, 34 model years.

About the KTM 250 EXC

The 250 EXC is the 300 EXC's smaller brother, and for a lot of riders it is the better bike. It is snappier and more playful, it is a touch lighter, and it rewards a rider who likes to rev a two stroke. It has all the same kit: electric start, hydraulic clutch, registration, and TPI then TBI fuel injection from 2018.

It suits a lighter or more aggressive rider, an enduro racer in the E1 class, or a trail rider who finds the 300 too lazy. Against the 300 EXC it gives away torque in the steep, technical stuff and gains a livelier feel everywhere else. Against a Husqvarna TE 250 or GasGas EC 250 it is the same bike with different suspension and bodywork.

What changed by year

2008 to 2016
Carburetted, electric and kick start, linkage rear end from 2012. Premix and jetting.
2017
New generation: lighter frame, new engine, WP Xplor fork. Still carburetted.
2018 to 2023
TPI fuel injection with oil injection. 2020 got mapping and chassis updates, 2023 was the next new generation.
2024 onwards
TBI throttle body injection. The current bike.

Servicing a 250 EXC

Gearbox oil every 10 to 15 hours (about 800 ml of a light gear oil or JASO MA 10W 40), air filter every ride in dust, and keep the oil injection tank full on the TPI and TBI bikes. A 250 revs harder than a 300, so top ends come a little sooner: rings around 50 to 70 hours and a piston around 100 for a trail bike, sooner if raced.

Clean the power valve at every top end. Grease the linkage and swingarm after wet rides and keep the coolant fresh.

Engine hours between jobs: the schedule the Digital Garage tracks for this bike, based on the manual. Racers and hard riders go sooner, as above. Ride in sand or mud and halve the engine ones.

JobEvery
Air filter clean and re-oil3h
Chain clean, lube and adjust5h
Spoke tension check10h
Fastener torque check10h
Transmission oil change15h
Cables and throttle lube15h
Air boot and intake seal check25h
Spark plug replace25h
Rings only replace30h
Silencer repack30h
Linkage bearings grease30h
Rear brake pads30h
Power valve clean40h
Tyres inspect / replace40h
Tubes and rim locks40h
Clutch plates inspect50h
Chain slider, guide and roller50h
Front brake pads50h
Grips inspect / replace50h
Top end rebuild (piston and rings)60h
Reed valve inspect60h
Fork service (oil and seals)60h
Swingarm bearings grease60h
Steering head bearings grease60h
Wheel bearings inspect60h
Radiator, hoses and clamps60h
Carburettor / throttle body clean80h
Chain and sprockets replace80h
Shock service80h
Wiring and connectors80h
Bottom end inspect / rebuild100h
Water pump seal and impeller100h
Brake discs inspect100h

Parts that fit a 250 EXC

Everything that fits a 250 EXC

Buying a used KTM 250 EXC

On a carburetted bike ask about the jetting and the last top end. On a TPI bike make sure the oil injection has never run dry and it idles cleanly hot. Look for a dented pipe, bent radiators, a cracked sump guard and a worn clutch. Check the rego status and whether it has been de restricted.

Recent sold prices are on the Marketplace page linked below.

Used KTM 250 EXCs for sale

None listed right now. Selling one? List it free →

KTM 250 EXC known issues

KTM 250 EXC questions

250 EXC or 300 EXC?
The 300 has more torque for steep and technical riding. The 250 is snappier and more playful. Heavier riders and hard enduro riders pick the 300; lighter riders and racers often prefer the 250.
Does the 250 EXC need premix?
The 2018 onwards fuel injected bikes have oil injection. Carburetted bikes before that need premix.
Is the 250 EXC road registrable?
Yes. It is sold ADR compliant and can be registered in every Australian state.
How often does a 250 EXC need a top end?
Rings around 50 to 70 hours and a piston around 100 for a trail bike, sooner if it is raced.

Other KTM models

KTM 250 EXC Guide: Years, Servicing, Known Issues and Used 250 EXCs for Sale | MWMX