KTM is introducing a new two-stroke engine with a fuel injection system to its 2018 EXC enduro lineup. KTM calls the new technology “Transfer Port Injection” or TPI, with a new 250 EXC TPI and 300 EXC TPI arriving in European showrooms this summer while North Americans will have to wait until late fall for the 250 XC-W TPI.

“This is an incredibly exciting development for KTM. We have been developing two-stroke fuel injection for some time, and our goal was to create competitive motorcycles with all the benefits of fuel injection, while fitting into our READY TO RACE mantra,” says Joachim Sauer, KTM Product Marketing Manager.

The mantra may already be truth as KTM riders Andreas Lettenbichler and Lars Enockl are rumored to have raced on pre-production fuel injected 300 models in the Roof of Africa race in Lesotho late last year.


The Roof of Africa provided KTM with an opportunity to test its Transfer Port Injection technology in a variety of temperatures and altitudes.

“There has been extensive testing and considerations for our Research and Development team to take into account during this process, so we are very motivated by this next step and world first in technology, as we take a major step forward in this segment,” says Sauer.

According to KTM, the new engine consumes much less gas than carbureted models and forgo the need to pre-mix fuel or adjust jetting. KTM will reveal more information on its TPI technology in May.

  • Old MOron

    Go, KTM!

    • gjw1992

      Yeah, talk about building a brand. KTM are brilliant.

  • Dootin

    Now we need a 500cc V4 two stroke duke.

  • mikstr

    nothing new here, been in snowmobiles since 2004 (launched by Rotax under the name “semi-direct injection”, or SDI)…. in fact, sledders even have DI two-strokes now (since 2009)

  • Mikael Jansson

    Does this mean we might have 2T road bikes eventually? From around the ‘net I’ve seen mentions of Euro4 compliance on these new 2T TPI engines.

  • Malcolm Turncoat

    this is likely to be a development with Rotax who are still churning out a lot of 2smoke snow and water vehicles