Had the rear brake problem with mine here in Spain. Dealer in Alicante said it had been fixed on 1st service by replacing the reservoir but I think they only tried bleeding the system. Lasted approx 3 weeks before back to pumping pedal to get it working. Bled system myself and ok for a month or so. Had 1st years service in November and been perfect ever since. They said they had replaced part of the abs under warranty but their English and my Spanish not good enough to tell you which part I'm afraid. I think the morale here is to keep taking it back to the dealers until they get it right because it's a fantastic bike when it's working properly.