
Two piston rings for the blown 40 mm cylinder for Velux models or X30 NG-2AH mopeds.
Consisting of an L-piston ring and a normal C-piston ring.
| Diameter | 40 mm |
| Piston ring mold | L-ring, Rectangular ring |
| Nominal diameter | 40 mm |
| Piston ring impact | Internal fuse (IS), Flank safety device (FS) |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
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