42 mm piston, compatible with your Puch Maxi S / N, Supermaxi LG1 / LG2, and your X30 Sport NS / NL moped with an E50 / ZA50 (air-cooled) / ZA50 (catalytic converter) or Z50 engine.
This replacement piston with a 42 mm diameter is suitable as a replacement part for the modified CH12 AKOA Puch cylinder with 60 ccm. You can find the detailed dimensions of the piston according to the technical drawing in the product specifications. The piston kit comes complete with piston rings, piston pins, and retaining rings, so you’ll have everything you need for installation.
Notes:
The piston is installed with the arrow pointing toward the exhaust port. Also note the installation direction of the piston rings: The “R” marking points toward the cylinder head.
You can find the matching cylinder and all replacement parts in the accessories section.
Brand-name product from the manufacturer AKOA.
| Manufacturer | AKOA |
| Material | Aluminum |
| Nominal diameter | 42 mm |
| Ø outside piston (A) | 41.95 mm |
| Compression height (C) | 22.58 mm |
| Curvature (D) | 3.36 mm |
| Total piston height (E) | 52.52 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | Rectangular ring |
| Ø piston pin (B) | 12 mm |
| Piston ring impact | Internal fuse (IS) |
| Piston ring height | 1.46 mm |
| Thick piston ring | 1.65 mm |
| Weight piston kit | 84.7 g |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
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