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KTM unveil fuel-injection two-stroke models

Published: 16 May 2017

Updated: 16 May 2017

KTM have taken the wraps off their two new fuel injected enduro machines, the 250 EXC TPI and 300 EXC TPI. The two new models are the world's first production fuel-injected two-stroke off-road motorcycles.

The two models use Transfer Port Injection, which means the twin fuel injectors will fire directly into the transfer port. KTM say this method of fuel injection smooths out power delivery, and also results in a drastic reduction in fuel consumption. For off-road riders this means there's no need to pre-mix fuel, and no need to change the jetting for different environments.


The new models also feature a new Engine Management System and ECU which use sensors to determine the perfect ignition timing and fuel injection. Also new for 2018 are the cylinder, air filter box, oil pump, fuel tank for the fuel injection application and chromoly steel frame that has been adapted to house the oil filler cap and hose to the oil tank within the frame tube.

Joachim Sauer, Product Marketing Off-road, said: "It is a very proud moment for us to unveil the world’s first serial electronic fuel injection 2-stroke off-road competition bikes. We at KTM are committed to developing revolutionary technology, and with the KTM 250 EXC TPI and KTM 300 EXC TPI models we feel the game has once again been changed, as this is a global first. Our goal was to create a two-stroke enduro bike that would not be incredibly complex, while also retaining the feel of a carbureted machine, yet with all the benefits of fuel injection. This includes the elimination of the need to pre-mix fuel or change the jetting for different environments, which is a major benefit to the rider for hassle free, two-stroke fun."

The new models will be available at KTM dealers in June and prices are yet to be announced.

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