Replacement piston for the fan-cooled 41 mm cylinder with a 12 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 methods 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 41.01 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 from the premium swiing® brand, designed to meet the highest standards.
| Surface | molybdenum-coated |
| Nominal diameter | 41 mm |
| Manufacturer | swiing® ingenious parts |
| 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 |
| Ø piston pin (B) | 12 mm |
| Weight piston kit | 94 g |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
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GPO piston 41 mm (12 mm KoBo) | Puch X30 Velux, M50, MS50, VS50, DS50, VZ50
Manufacturer: GPO · Nominal diameter: 41 mm · 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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Ø outside piston (A): 40.94 mm · Compression height (C): 23.25 mm · Curvature (D): 3.65 mm · Total piston height (E): 49.35 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 41 mm · Piston ring mold: L-ring · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.5 mm · Piston ring height: 2 mm · Ø piston pin (B): 10 mm · Weight piston kit: 85 g
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GPO gasket set 40 - 41 mm cylinder fan-cooled | Puch X30 NG-2AH, Velux
Manufacturer: GPO · Number of components: 4 pcs · Ø cylinder: 40 mm · Ø cylinder: 41 mm · Ø outlet inside: 22 mm · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Hole spacing inlet: 38 mm · Area of application: Tuning
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swiing® ingenious Piston 41 mm (10 mm bore) Racing | Puch X30 Velux, M50, MS50, VS50, DS50, VZ50
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 · Nominal diameter: 41 mm · 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
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