Description of Defect: I am reporting a severe safety hazard regarding the plastic fuel tank on my 2021 KTM 690. On this specific motorcycle architecture, the plastic fuel tank is a load-bearing, structural component that acts as the rear subframe. The rear passenger footpegs and the entire rear seat assembly mount directly onto this plastic fuel tank structure.The tank has severely warped, expanded, and deformed. This material warping introduces severe structural stress to the factory mounting points, creating a high risk of catastrophic structural breakage while in motion. A failure here puts both the rider and a passenger in immediate physical danger of a crash or separation from the motorcycle.Furthermore, this swelling and warping has caused the fuel filler neck area to become completely non-flush. This prevents the fuel filler cap assembly from sealing correctly against the tank surface, leaving a noticeable gap where fuel sloshes out and seeps past the filler cap during regular operation. This creates a simultaneous, severe fire hazard directly over the hot exhaust. Prior Actions & Context: KTM previously acknowledged manufacturing defects on older models under NHTSA Campaign Number: 17V388000. However, the exact same structural warping, material swelling from ethanol exposure, and sealing failures are actively persisting on my 2021 model. Because this tank functions as the primary structural subframe and carries passenger weight, its deformation poses a critical mechanical and fire hazard. I am requesting that the NHTSA expand its investigation into later-year KTM 690 tank assemblies to mandate a permanent structural remedy from the manufacturer.
- NHTSA ID
- 11765654
- Incident
- Sep 20, 2026