41.0 mm replacement piston with a rectangular piston ring with flank circlip (FS) and an L-shaped piston ring with internal circlip (IS) for the blown 41 mm Puch X30 Velux mopeds / mopeds and M50, MS50, VS50, DS50, VZ50 small engine bikes with 12 mm piston pin.
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.
| Nominal diameter | 41 mm |
| Manufacturer | GPO |
| Ø outside piston (A) | 40.94 mm |
| Compression height (C) | 23.2 mm |
| Curvature (D) | 3.7 mm |
| Total piston height (E) | 49.3 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), Flank safety device (FS) |
| Weight piston kit | 85 g |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
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