I shouted victory too fast lol Always the same scenario : at the beginning, all is OK with front braking when engine is still not warm. after a 15mn ride in a very slow heavy traffic. When i pulled the front brake, i felt like a bursting bubble in the lever, and the abs light started flashing. what is certain and reassuring somewhere, is that the partial brake bleeding solved the problem temporarily. So, next step, full bleed of the whole ABS circuit !