Replacement piston for the fan-cooled 41 mm cylinder with a 10 mm piston pin and 2 pieces of 1.5 mm rectangular piston rings with flank locking (FS), compatible with Puch X30 Velux 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 end faces, and retaining types in the legend accompanying the images.
This special piston features a molybdenum coating. When combined with oil, this provides high-quality wear protection with excellent sliding properties. The piston is more durable and offers a slight performance boost compared to an original Meteor piston.
Note: We recommend a clearance of 0.06–0.07 mm for these pistons; the cylinder should therefore be honed to 41.03 mm.
The piston kit includes piston pins, piston clips, and piston rings.
Note: Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust port on the exhaust side.
You can find the appropriate installation tools, piston pin locks, and, if necessary, the corresponding cylinder in the accessories section.
A sophisticated product meeting the highest standards from the swiing® quality brand.
| Nominal diameter | 41 mm |
| Manufacturer | swiing® ingenious parts |
| Surface | molybdenum-coated |
| Ø outside piston (A) | 40.95 mm |
| Compression height (C) | 22.5 mm |
| Curvature (D) | 3.5 mm |
| Total piston height (E) | 50 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 1.5 mm |
| Thick piston ring | 1.7 mm |
| Ø piston pin (B) | 10 mm |
| Weight piston kit | 93 g |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
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Nominal diameter: 41 mm · Manufacturer: GPO · Ø outside piston (A): 40.94 mm · Compression height (C): 23.2 mm · Curvature (D): 3.7 mm · Total piston height (E): 49.3 mm · Number of piston rings (F): 2 pcs · Piston ring mold: L-ring · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring impact: Internal fuse (IS) · Ø piston pin (B): 12 mm · Weight piston kit: 85 g
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swiing® ingenious Piston 41 mm (12 mm bore) Racing | Puch X30 Velux, M50, MS50, VS50, DS50, VZ50
Nominal diameter: 41 mm · Manufacturer: swiing® ingenious parts · Surface: molybdenum-coated · Ø outside piston (A): 40.95 mm · Compression height (C): 22.5 mm · Curvature (D): 3.5 mm · Total piston height (E): 50 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Ø piston pin (B): 12 mm · Piston ring height: 1.5 mm · Weight piston kit: 94 g
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