- Borrows styling from bigger Bonnevilles
- Likely to get a smaller capacity engine for select markets
- Could be launched in later half of 2026
Triumph Motorcycles is expanding its small-capacity lineup with the upcoming Bonneville 400, which has now been spotted testing, revealing key details ahead of its expected launch.
From the spy shots, the bike clearly stays true to the Bonneville family design. It features a round LED headlight, a teardrop-shaped fuel tank, long and chunky mudguards, and the signature peashooter exhaust, classic cues that define the brand’s retro appeal.
Underneath, the hardware remains traditional as well. The bike uses gaitered telescopic front forks and twin rear shock absorbers, similar to larger Bonneville models. However, it blends this old-school setup with modern touches, including a single-pod digital instrument console that is likely to support smartphone connectivity and turn-by-turn navigation.
On the engine front, Triumph appears to be taking a market-specific approach. For India, the bike is expected to use a downsized 349cc single-cylinder engine to take advantage of lower taxation in the sub-350cc category. Meanwhile, international markets are likely to get the familiar 399cc engine seen in the Triumph Speed 400 and Triumph Scrambler 400 X.
This move aligns with Triumph’s broader strategy to localise and optimise its 400 platform for different markets. The brand has already explored variations within this range, including models like the Tracker 400, as it builds out a more versatile entry-level portfolio.
Expected to launch in the second half of 2026, the Bonneville 400 will likely compete directly with retro roadsters such as the Royal Enfield Classic 350.
