BSA Thunderbolt ADV Unveiled at EICMA 2025 with 334cc Liquid-cooled Engine

At the EICMA 2025 show, BSA unveiled the Thunderbolt, its first adventure motorcycle, marking the brand’s entry into the growing ADV segment. The model brings back the Thunderbolt nameplate, last seen in 1972, highlighting BSA’s plan to diversify beyond its retro line-up. The new model aims to connect the company’s legacy with present rider preferences focused on versatility and function.

Positioned between road and trail use, it strengthens the brand’s foothold in the mid-capacity category as the global motorcycle market shifts toward multipurpose models. With this reveal, BSA plans to compete in the sub-350cc ADV segment against models such as the Hero Xpulse 210 and TVS Apache RTX 310.

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A global launch is expected by mid-2026, with local manufacturing in India likely to help achieve competitive pricing and support BSA’s broader international revival.

BSA Thunderbolt ADV: Design and Feature

The BSA Thunderbolt has been developed to perform across varied surfaces. The frame uses USD front forks with 200mm of travel and a rear mono-shock offering 180mm, both aimed at achieving consistent control. A reinforced bash plate offers protection to the engine and frame undersides. Its structure incorporates an exoskeleton design that enhances rigidity. These features contribute to a chassis setup designed for mixed-terrain comfort, ensuring composed performance on highways as well as light gravel paths.

The motorcycle features a range of rider-focused technologies aimed at improving safety and adaptability. It includes traction control, a three-stage ABS system with rain, road, and off-road modes, and a slip and assist clutch to ease gear transitions. The upswept exhaust enhances water-wading capability, adding resilience in tricky conditions. 

BSA Thunderbolt: Engine

The Thunderbolt is powered by a 334cc, single-cylinder, liquid-cooled DOHC engine that complies with Euro 5+ norms. Shared with the Yezdi Adventure, this engine produces around 29bhp and is paired with a six-speed gearbox. The setup balances efficiency and steady acceleration, aligning with global trends favouring middleweight motorcycles designed for mixed-purpose riding.

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For rider comfort, the Thunderbolt has a 15.5-litre fuel tank to support extended travel, an 815mm seat height for accessibility, and wide handlebars for better steering control. Its adjustable windscreen and Bluetooth-enabled digital dashboard offer navigation and USB connectivity.