Riders of the KTM 990 Adventure have come to count on a recurring fuel pump problem. There has been much discussion of this issue in online forums and owner groups. While some riders report frequent failures, others say they’ve never had a problem. The fuel pump problem can show itself as a problem starting the bike or as a sudden loss of power while riding. Debates rage as to whether this is a design flaw, a quality control issue, or just a maintenance-sensitive component. For some owners, they have found DIY solutions or aftermarket replacements; others depend on regular preventative maintenance. This is an ongoing problem that raises questions about the reliability and long-term ownership costs of the bike, especially of a used 990 Adventure.