Athena Big Bore 70cc Cylinder Minarelli vertical AC 12mm pin

Aluminium Cylinder, from the manufacturer Athena Racing for Minarelli Vertical AC engines.
This is a cylinder equipped with a Piston with 1 single ring and 12 mm pin, with a 47.6 mm diameter and cylinder head.
Manufactured from aluminium and equipped with a flat-head piston with one ring, this Cylinder from Athena is the ideal base for a racing-type setup with good performance, reaching between 16 and 19 hp with proper tuning.
Due to its innovative design for bolting the cylinder directly to the crankcase and the cylinder head to the cylinder, it is possible to obtain 5 transfer ports and a trapezoidal exhaust port with exhaust booster.

Compression ratio: 13.8:1

Adaptable to Minarelli Vertical engines. Yamaha Bw's, MBK Booster...

The kit includes:

• Aluminium Cylinder.
• Piston with 1 ring.
• Gasket set
• Cylinder head.
• Carbon reeds.

Attention: To install this cylinder, a reinforced crankshaft is recommended.