In the 2020s, KTM is rumored to be developing a new 990 Duke, which would be a successor to the KTM 990 Super Duke that was last seen in their lineup 10 years ago. The speculation about a new 990 Duke gained strength in January 2023 when engine drawings from China suggested that the cylinder of the LC8c engine was elongated, indicating significant changes. Now, the existence of the 990 Duke prototype has been further confirmed by spy photos taken during testing. The photos show a partially undisguised prototype, with the rider wearing a matching set of leathers and helmet.

The test mule featured in the photos has a black-and-white color scheme, with hints of KTM’s signature orange on the front fork and the piping around the soft panniers attached to the tail. The rider’s helmet, boots, and race suit also have orange accents. However, the right side of the bike is not visible in these shots, only the front, left side, and rear. The test bike has black alloy wheels with a different spoke pattern compared to the 2023 890 Duke R. The mirrors appear to be similar between the test bike and the 890 Duke.

One noticeable difference between the test bike and the 890 Duke R is the front headlight and cowling design. The 990 Duke prototype features a smaller, angular lattice surrounding a smaller headlight, which gives the impression of brightness despite its size. The swingarm of the test bike also appears to be revised compared to the existing 890 Duke R.

Although the 990 Duke’s styling stays true to Kiska’s signature sharp and angular design language for KTM, it offers a unique take on naked styling. It is expected that the official debut of the completed KTM 990 Duke will take place towards the end of 2023 as a 2024 model. However, it is unclear if the unveiling will happen at EICMA 2023 in November or at a different event. Regardless, motorcycle enthusiasts will be keeping a close watch for updates on this highly anticipated model.