Triumph Bonneville 400 launch date and what to expect

Triumph is set to reveal the Bonneville 400 on October 6, adding a more traditional retro roadster to its 400cc family. The bike is aimed at buyers considering motorcycles such as the Honda CB350, Royal Enfield Classic 350 and Bullet 350, but it is not on sale yet, so there are still some important details to wait for.

Triumph Bonneville 400 reveal date

Triumph is preparing to show four new motorcycles on October 6. The Bonneville 400 is the most clearly identified model among them, while the other three appear to be a Street Triple and two Tiger models.

The Bonneville 400 has already been seen in testing, but the October 6 reveal should give buyers a much clearer idea of the production motorcycle. It is expected to join Triumph's existing 400 portfolio as a modern take on the Bonneville name.

Bonneville 400 design changes

The Bonneville 400 is based on the same basic platform used by Triumph's other 400 models, but the chassis and suspension arrangement are different. The test bikes show a setup designed around its classic styling rather than simply carrying over the Speed 400's hardware.

• Gaitered telescopic forks instead of USD forks
• Twin rear shocks instead of a monoshock
• New-looking chassis and swingarm
• Teardrop tank and flat bench seat
• Circular headlamp and peashooter-style exhaust

Bonneville 400 engine and rivals

The India-spec bike is expected to use the 349cc single-cylinder liquid-cooled engine. The source indicates it could be tuned in a relaxed manner, similar to the Speed T4's 29hp and 31Nm, but the final Bonneville 400 output has not been confirmed here.

This puts the Bonneville 400 into a part of the market where the Honda CB350 and Royal Enfield Classic 350 already have strong recognition. The key question for buyers will be how Triumph positions the new bike when the final details are revealed.

What are you expecting from the Bonneville 400 when Triumph reveals it on October 6?