38mm piston kit with two 1.5mm rectangular piston rings with flank protection (FS) for your Puch moped as well as Tomos Funtastic, Funsport, or Roadie mopeds with an A55 engine.
You’ll find the detailed piston dimensions, based on the technical drawing, in the product details. You can also find information about common piston rings, their clearances, and retention types in the legend accompanying the images.
The package includes pistons, piston pins, piston clips, and piston rings.
Notes:
Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
The piston can also be used in Tomos mopeds with an A35 engine, provided that the intake and exhaust are also replaced.
You can find additional piston kits, the necessary installation tools, and, if needed, the matching cylinder in the accessories section.
A quality product from the Italian manufacturer Vertex.
| Manufacturer | Vertex |
| Ø outside piston (A) | 37.97 mm |
| Compression height (C) | 22.5 mm |
| Curvature (D) | 3 mm |
| Total piston height (E) | 52 mm |
| Number of piston rings (F) | 2 pcs |
| Nominal diameter | 38 mm |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 1.5 mm |
| Ø piston pin (B) | 12 mm |
| Weight piston kit | 70 g |
| Puch | |
| Tomos | Fun Sport'R Roadie |
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