I had a small but easily fixable problem with my Woodsman recently. It felt just like a two stroke fouling a plug and the engine management light would come on for a moment until the engine cleared. This happened several times until I realised that it only occurred when I had my tank bag fitted. I repositioned my bag so that it did not cover the filler cap and solved the problem! Somehow, the bag was restricting air getting into the fuel tank, eventually stopping the fuel flow. You live and learn!