Classic Fiat 500 126 700cc 79.5 Big Bore Piston & Cylinder Race Kit

Unlock the full performance potential of your classic Fiat with the Athena 700cc Big Bore Kit, developed by Athena’s R&D department using advanced engineering and premium materials to deliver exceptional power, reliability and durability.

The kit includes 2 aluminium cylinders with Motor-Niksil (Nickel-Silicon Carbide) coating, 2 forged flat-top pistons with anti-friction coating, and a precision laser-cut steel cylinder base plate for accurate installation.

Features & Benefits

• High-performance aluminium cylinders provide superior heat dissipation compared to cast iron, ideal for air-cooled Fiat engines.
• Advanced Motor-Niksil cylinder coating reduces friction, improves piston movement and minimises wear for long-lasting performance.
• Forged racing pistons manufactured from high-silicon aluminium alloy offer excellent strength, reduced thermal expansion and tighter piston-to-cylinder tolerances.
• Molybdenum Bisulfide anti-friction piston coating improves efficiency and durability.
• Precision laser-cut steel base plate ensures correct squish clearance and stable cylinder support.

Developed through extensive dyno and track testing, this kit has enabled a competition Fiat 126 engine to produce up to 50 HP—more than double the power of a standard engine.

Whether you’re building a fast road car, historic racer or hillclimb machine, the Athena 700cc Big Bore Kit offers a perfect combination of modern technology, proven performance and outstanding reliability.

PLEASE NOTE: Proper installation of the cylinder kit requires a crankshaft with a 70mm stroke and connecting rods with a 130mm centre-to-centre distance. (These parts are not included in the kit)

This product is intended to be fitted by a trained professional. English instructions can be provided.