38.4 mm piston with two 1.5 mm rectangular piston rings with flank lock (FS) for Piaggio mopeds / mopeds with the Athena cylinder kits for Piaggio.
The detailed dimensions of the piston according to the technical drawing can be found in the details. You can also find out about the relevant piston rings, their stems and locking types on the legend in the pictures.
| Manufacturer | Athena |
| Nominal diameter | 38.4 mm |
| Ø outside piston (A) | 38.32 mm |
| Compression height (C) | 26.3 mm |
| Curvature (D) | 3.9 mm |
| Total piston height (E) | 51.83 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring impact | Internal fuse (IS) |
| Piston ring mold | Rectangular ring |
| Piston ring height | 1.5 mm |
| Ø piston pin (B) | 12 mm |
| Weight piston kit | 76 g |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
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