39.0 mm piston with a 1.5 mm rectangular piston ring with flank lock (FS) for Zündapp ZR25 / ZR50 mopeds / mopeds with a type 250 engine.
The detailed dimensioning 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 | Meteor |
| Nominal diameter | 39 mm |
| Ø outside piston (A) | 39 mm |
| Compression height (C) | 23.2 mm |
| Curvature (D) | 1.5 mm |
| Total piston height (E) | 48 mm |
| Number of piston rings (F) | 1 pcs |
| Piston ring mold | Rectangular ring |
| Ø piston pin (B) | 12 mm |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 1.5 mm |
| Tolerance group | BC |
| Weight piston kit | 76 g |
| Zündapp | ZR 10 / ZR 20 / ZR 22 / ZR 30 / ZB 22 (type 250-447) ZD 10 / ZD 30 (type 250-466) ZA 25 / ZA 40 (type 250-460) |
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