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KTM's 250 and 300 two-strokes across motocross SX, cross-country XC and enduro EXC/XC-W/MXC, including the TPI and TBI injected versions.
1992 – present · 249cc · 2-stroke
All-new frame and engine with throttle-body fuel injection and electric start only.
New frame, aluminium head stays and reworked engine details.
2006 – present · 249cc · 2-stroke
SX-derived throttle-body-injected platform with electric start only.
2006 – present · 249cc · 2-stroke
New frame, throttle-body injection, electric start only.
1990 – present · 293cc · 2-stroke
New hydroformed frame and throttle-body injection; no kick-start.
2023 – present · 293cc · 2-stroke
New open-class 293cc motocross two-stroke on the 2023 fuel-injected, electric-start SX platform.
2006 – present · 293cc · 2-stroke
All-new engine and SX-derived chassis with throttle-body injection and electric start only.
2006 – present · 293cc · 2-stroke
New frame, throttle-body injection and electronic power valve; no kick-start.
1990 – 2025 · 249cc · 2-stroke
New frame and throttle-body injection.
1995 – 2002 · 249cc · 2-stroke
One generation until research dates a platform change.
1990 – 2005 · 2-stroke
Generation added: catalogue 1994-2004 plus motorcycle.com 2005.
New frame and new counterbalanced engine with twin-valve power valve.
Completely new chassis and a new cylinder.
Fully redesigned frame, swingarm, bodywork and engine.
Transfer-port injection with oil injection, sold as the 250 XC TPI.
New lighter counterbalanced engine and Mikuni TMX carburettor.
New frame, swingarm and bodywork shared with the off-road range.
Original US cross-country version of the 250 two-stroke, 5-speed and carburetted.
New chassis and transfer-port injection on all US XC-W models.
New counterbalanced engine and chassis; TPI offered alongside the carburettor from 2018.
New frame, swingarm and bodywork.
Electric start added; 6-speed from 2011.
US rename of the 250 EXC as an off-road-only wide-ratio bike.
New frame for the EXC range, TPI.
New counterbalanced engine and chassis; transfer-port injection replaced the carburettor in Europe from 2018.
New frame; DDS clutch 2013, WP 4CS fork and orange frame 2015.
Electric start, the first on a two-stroke enduro from a major maker; 6-speed from 2011.
New frame and engine changes.
PDS linkless rear suspension; hydraulic clutch 1999, new cylinder 2000.
Original 300 EXC, introduced alongside the 300 MX and D/XC.
Transfer-port injection with oil injection, sold as the 300 XC TPI.
New counterbalanced engine and Mikuni TMX carburettor.
New frame, swingarm and bodywork shared with the off-road range.
Original US cross-country 300, 5-speed and carburetted; electric start by 2010.
New chassis and transfer-port injection on all US XC-W models; carburetted 300s ended.
New counterbalanced engine and Mikuni TMX carburettor; TPI offered alongside from 2019.
New frame; 4CS fork and orange frame from 2015.
Electric start; 6-speed from 2011.
US replacement for the 300 EXC: off-road-only, 5-speed, with stator.
New frame for the EXC range, TPI fuel injection.
New counterbalanced engine and chassis; transfer-port injection replaced the carburettor from 2018.
New frame, swingarm, shock, fork, wheels and bodywork.
Electric start added (EXC-E); 6-speed from 2011.
New frame shared with the 300.
Early EXC with PDS linkless rear suspension from 1998.