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KTM's small-bore two-strokes (125, 144, 150, 200) in motocross SX, cross-country XC and enduro EXC/XC-W/MXC forms.
1992 – present · 125cc · 2-stroke
All-new frame and engine with throttle-body fuel injection and electric start only.
2021 – present · 125cc · 2-stroke
SX-derived fuel-injected platform; new frame in 2025.
1990 – present · 125cc · 2-stroke
125 SX engine with throttle-body injection, electric start and 150 EXC gearbox parts.
2017 – present · 144cc · 2-stroke
New frame, throttle-body injection, electric start only.
2020 – 2025 · 144cc · 2-stroke
New frame and throttle-body injection.
2007 – 2025 · 144cc · 2-stroke
Revived on the 2023 fuel-injected, electric-start platform with the 2025 frame update.
2010 – 2014 · 144cc · 2-stroke
150 SX engine in a cross-country setup on the 2007–2011-era small-bore chassis.
1998 – 2016 · 193cc · 2-stroke
Completely revamped frame and cast swingarm; electric start from 2013.
Moved to a bigger frame similar to the 250's.
1998 – 2003 · 193cc · 2-stroke
Generation added; first pass had none.
2003 – 2004 · 193cc · 2-stroke
193cc engine in the 125/250 SX chassis of the period.
2006 – 2009 · 193cc · 2-stroke
Original US XC line with the 193cc engine.
2006 – 2016 · 193cc · 2-stroke
Revamped frame and swingarm; electric start from 2013.
Bigger, 250-style frame.
All-new chassis, 6-speed Pankl gearbox and narrower DS clutch.
New engine with new cases and cylinder, 4.4 lb lighter; revised frame.
Completely new chassis including frame, swingarm and bodywork.
Fully redesigned frame, swingarm, bodywork and a smaller, lighter cylinder and head.
First of the 'modern' KTMs with the linkless PDS shock; details of this period are thin.
125 SX-based engine with electric start in the off-road chassis, carburetted.
Carburetted, kick-start competition 125 enduro on the 2017 XC-W chassis.
New frame, swingarm, airbox, exhaust and bodywork.
Earlier 125 EXC chassis; internal boundaries not confirmed.
First year filled: catalogue '150 XC-W TPI' (USA) for 2020; motorcycle.com 'XC 150 W TPI' 2020.
Mikuni-carburetted, kick-start 150 replacing the 200 XC-W.
New 144cc enduro with transfer-port injection and oil injection.
New SX chassis and 6-speed Pankl gearbox.
New engine shared with the 125 SX.
New SX chassis shared with the 125.
Replaced the 144 SX on the 125 SX chassis.
From merged 144-sx.
Original 200 frame; upside-down fork from 2000.
US rename of the 200 EXC on the original 200 frame.