Athena previews a new Big Bore Extreme cylinder kit ath EICMA 2026

Alonte (Vicenza), November 2026 – At EICMA 2026, Athena unveils the next evolution of its Big Bore Extreme cylinder kit range, previewing a new kit for the KTM SX-F 250 cc (2023–2027), Husqvarna FC 250 cc (2023–2027) and GASGAS MC-F 250 cc (2024–2027).

Already available for Honda, Yamaha and Kawasaki, as well as previous generations of KTM, Husqvarna and GASGAS motocross bikes, the Big Bore Extreme range now extends to the latest 250cc 4-stroke platforms, further strengthening Athena’s offering in the off-road aftermarket.

Featuring an 86 mm bore cylinder, the new kit takes the original 250cc engine into the 300cc class, delivering increased power and torque, sharper acceleration and stronger drive out of corners, while retaining the balance and rideability of the original motorcycle.

Built around Athena’s expertise in integrated performance systems, the kit combines an 86 mm bore cylinder, engineered for durability and consistent performance under demanding off-road conditions, with a high-performance forged aluminum piston, designed to handle increased mechanical and thermal loads. A dedicated gasket set ensures reliable sealing.

Completing the system is the GET Boost, the pre-configured electronic module developed by GET, Athena Group’s electronics brand. Specifically calibrated for the Big Bore application, it optimizes engine management to unlock the potential of the increased displacement while retaining the original ECU.

The new Big Bore Extreme kit (part number P400270100027) will be available for:

• KTM SX-F 250 cc, model years 2023–2027
• Husqvarna FC 250 cc, model years 2023–2027
• GASGAS MC-F 250 cc, model years 2024–2027

Following its exclusive preview at EICMA 2026, the new kit will reach the market in mid-December 2026.

At EICMA, Athena also brings the Big Bore Extreme experience to life through an immersive virtual reality challenge. Going head-to-head with a standard 250cc on a virtual track, visitors can experience how the extra power, torque and acceleration of the 300cc configuration translate into stronger drive, helping riders gain ground and save valuable time on the track.

Visitors can take on the challenge at the Athena stand, Hall 5 – Booth E54.

With this latest addition, Athena reinforces its commitment to the off-road aftermarket, bringing its engineering expertise and integrated approach to an ever-wider range of motocross applications.

Reality begins now.

For more information about the Big Bore Extreme range, visit athena.eu