38 mm replacement piston with two rectangular piston rings featuring flank protection (FS), compatible with original air-cooled aluminum cylinders with a nickel-silicon carbide coating (commonly known as Nikasil) from Puch Maxi S / N, as well as Puch X30 Sport mopeds.
Also compatible with fan-cooled gray cast iron cylinders from Puch X30 NG-2A / NG-2AH, as well as Puch X30 Velux mopeds.
You can find the detailed dimensions of the piston according to the technical drawing in the details section. You can also find information about the standard piston rings, their clearances, and retaining methods in the legend accompanying the images.
Tolerance Number 2
The piston kit includes piston pins, piston clips, and piston rings.
You’ll find the necessary installation tools, piston pin retainers, and, if needed, the corresponding cylinder in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
| Nominal diameter | 38 mm |
| Manufacturer | GPO |
| Ø outside piston (A) | 37.96 mm |
| Ø piston pin (B) | 12 mm |
| Compression height (C) | 22.7 mm |
| Curvature (D) | 3.3 mm |
| Total piston height (E) | 55 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Flank safety device (FS) |
| Tolerance group | 2 |
| Weight piston kit | 79 g |
| Puch | E50 ZA50 (air-cooled) ZA50 (fan-cooled) Z50 (X30 Sport) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
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