The engine receives a new TVC exhaust control setting for MY 2015, opening at a 200-rpm higher engine speed. This results in smoother power development. The ignition curve has been optimised for this new TVC setting. The carburettor settings have also been revised with a view to better and more uniform engine characteristics.
The intermediate gear ratio for the electric starter has been shortened to achieve a more powerful initial torque, thereby ensuring a more reliable electric motor start function.
A new ignition cover featuring a new gasket has been developed for the KTM 300 EXC model year 2015. The gasket for the inner clutch cover is also optimised and helps to shield the unit better.