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  1. M

    Slippage/jumping in 4th gear?

    Greetings all, I have just got a 21 reg KTM 390 Duke, it's doing the same in 4th gear, not going out of gear but split second loss of drive (not clutch, feels more like injection) on firm accelleration, otherwise great bike. I called Gear4 to see if they have come across it and they have never...