KTM makes high-performance motorcycles, but there has been some discussion that their bikes, particularly their more complicated models like the RC 390 GP, aren’t very reliable long term. The purpose of this question is to find out exactly what owners with substantial bike mileage on their bikes have experienced. In this article, we’ll take a look at common problems that can occur, how often maintenance is needed, and how the bike fares when used in various conditions. What are the specific weak points to pay attention to? What does KTM’s dealer support and parts availability mean in the ownership experience? If we can gather insights from a range of riders, we can have a better idea of what to expect when owning an RC 390 GP outside the honeymoon period.