46 mm piston with a 2 mm and a 1.5 mm rectangular piston ring, as well as an internal retaining ring (IS) for Piaggio mopeds equipped with the Athena cylinder kit.
You can find the detailed dimensions of the piston, as shown in the technical drawing, in the product details. You can also find information about the standard piston rings, their clearances, and retaining methods in the legend accompanying the images.
The piston kit includes a piston pin, piston clips, and piston rings.
Note: Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
You’ll find the necessary installation tools, piston pin retainers, and, if needed, the corresponding cylinder among the accessories.
A quality product from the Italian manufacturer Athena.
| Manufacturer | Athena |
| Nominal diameter | 46 mm |
| Ø outside piston (A) | 45.93 mm |
| Compression height (C) | 26.05 mm |
| Curvature (D) | 3 mm |
| Total piston height (E) | 51.05 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | L-ring, Rectangular ring |
| Ø piston pin (B) | 12 mm |
| Piston ring impact | Internal fuse (IS) |
| Piston ring height | 2 mm, 1.5 mm |
| Tolerance group | A |
| Weight piston kit | 96 g |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
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