For years, the Royal Enfield Classic 350 has been dominating its segment. People love this motorcycle for its iconic retro design and strong road presence. The outgoing model is based on the modern J-platform and is quite reliable as well. The Classic 350’s dominance could end soon. Triumph will soon introduce a challenger, a test mule of which has now been spotted for the first time. The spy pictures show what is believed to be the ‘Bonneville 400’. It is too early to confirm the name or powertrain details of the production motorcycle.
Triumph already has a neo-retro roadster in the mid-capacity segment- the Speed 400. The motorcycle that’s been spied now, shows a clear deviation in visual identity and character. Instead of the Speed 400’s neo-retro approach, it leans heavily into traditional retro styling. This is a critical shift, as the Classic 350’s success is deeply rooted in a similar design language.
The Triumph motorcycle (let’s call it Bonneville 400 for now) seems to go by the same playbook. It is seen with a teardrop-shaped fuel tank, circular headlamp, a radiator grille that gels well with the rest of the design, classic-looking front and rear fenders, a belly pan and more. A strong visual resemblance can be found with the larger Bonneville T120. Slight design differences can be seen in areas like the fuel tank design.
The motorcycle in these images has wire-spoke wheels, enhancing its ‘authentic retro’ personality. On the production-spec, these are likely to be paired with tube-type tyres.
The Bonneville 400 will come with an all-new circular instrument cluster. The Speed, if you remember, has a semi-digital unit. The circular console also aligns with the bike’s retro positioning. The motorcycle seems to have a relaxed, upright riding position.
Spy shots also show that changes on the Bonnie will go beyond styling tweaks. It will have notable differences from the Speed 400 even in terms of hardware. Take a closer look and you’ll notice that instead of front USD forks, the Bonnie gets conventional RSY telescopic forks, complete with gaiters. This makes the design align better with the ‘retro brief’ and will likely facilitate a more relaxed cruising.
The rear gets a mono-shock setup on the Speed. The Bonneville 400, however, adopts twin shock absorbers instead. The subframe and swingarm were likely re-engineered heavily to facilitate this. The chassis tuning on the Bonnie is expected to lean towards comfor than outright performance or sportiness.
As can be seen in these images, both wheels get large disc brakes. A dual-channel ABS will be standard on the motorcycle. Notably, the front disc is mounted on the right side of the wheel and the rear one on the left side.
While we know that this Bonneville will have a mid-size engine, it is unclear is it would use the existing 400cc single-cylinder unit or the downsized TR-series (350cc) engine. The latter is more likely.
The entire Triumph 400 lineup is being readied for a transition to the smaller engine. The Bonneville could easily follow suite and come with the 350cc engine. If so, it will benefit from the lower tax slab (of 18%) and be positioned squarely against the Classic 350. The 350cc engine is a derivative of the 400cc engine, with the same stroke and reduced bore.
Since it qualifies for lower duties, Triumph will be able to price the Bonneville 400 (350) competitively. If so, it will become one of the most serious challengers yet to Royal Enfield’s dominance in the segment.
Images source: Moto Bob
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