KTM Reveals World’s First Fuel-Injected Two-Stroke Motorcycles

KTM has unveiled two new two-stroke Enduro bikes. Both bikes use transfer port injection technology and are the world’s first (not road legal) fuel-injected two-stroke motorcycles. The new Transfer Port Injection is a system which essentially uses two injectors to feed fuel into the transfer ports of the cylinder, mixing it with the flow of air and oil supplied through a throttle body. This new system is said to make the engine smoother to ride, with a drastic reduction in fuel consumption and removing the need to pre-mix fuel or changing the carb jetting for different environments.The new ECU uses a number of sensor readings to determine perfect ignition timing and fuel injection.

Both bikes have hi-end equipment, including fully adjustable WP suspension, Brembo brakes and a lightweight steel alloy double cradle chassis. The new models meet the latest emission norms and are Euro 4 compliant. Pricing for the new bikes haven’t been announced yet and are expected to be available by June. More importantly, it underlines the fact that two-stroke engines can be environmentally friendly. What remains to be seen is whether KTM will be rolling out road-oriented two-stroke powered models in the near future.

The KTM 250 EXC KTM 300 EXC TPI have hi-end equipment, including fully adjustable WP suspension, Brembo brakes and a lightweight steel alloy double cradle chassis. They meet the latest emission norms and are Euro 4 compliant. Pricing for the new bikes haven’t been announced yet and are expected to be available by June. More importantly, it underlines the fact that two-stroke engines can be environmentally friendly. What remains to be seen is whether KTM will be rolling out road-oriented two-stroke powered models in the near future.

2 Responses to “KTM Reveals World’s First Fuel-Injected Two-Stroke Motorcycles”


  1. 1 Stelvio May 18th, 2017 at 5:19 pm

    I know Cyril is just quoting what the KTM press release has in it, but this is not the world’s first fuel-injected two-stroke by a long-shot….. witness the 1997 Bimota V-Due road bike which actually was street-legal. And there were certainly two-stroke racing bikes that pre-dated the Bimota that were not street-legal, like these machines.

    http://www.odd-bike.com/2012/11/bimota-v-due-500-bike-that-killed-bimota.html

  2. 2 Mike P Hanlon May 22nd, 2017 at 10:40 am

    Hopefully this will usher in the return of two strokes. Four stroke racing operational costs are out of control. Bring back that amazing sound. I was at the Moro gp race in austin, the sound of the bikes will make you snooze

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Cyril Huze