38 mm piston with a 1.45 mm rectangular piston ring featuring an internal lock (IS), compatible with various Puch mopeds.
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 common piston rings, their contact surfaces, and retaining methods in the legend accompanying the images.
The piston kit includes a piston pin, piston clips, and a piston ring.
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 in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
| Nominal diameter | 38 mm |
| Manufacturer | GPO |
| Ø outside piston (A) | 37.95 mm |
| Ø piston pin (B) | 12 mm |
| Compression height (C) | 22.4 mm |
| Curvature (D) | 4.9 mm |
| Total piston height (E) | 53.85 mm |
| Number of piston rings (F) | 1 pcs |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Internal fuse (IS) |
| Piston ring height | 1.45 mm |
| Weight piston kit | 66 g |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
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