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.
| 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 |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
Accessories & related products
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 · Ø piston pin (B): 12 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) · Weight piston kit: 85 g
EUR 57.30
Piston 41 mm (10 mm KoBo) | Puch X30 Velux, M50, MS50, VS50, DS50, VZ50
Nominal diameter: 41 mm · Ø outside piston (A): 40.94 mm · Ø piston pin (B): 10 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 · 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 · Weight piston kit: 85 g
EUR 57.30
GPO gasket set 40 - 41 mm cylinder fan-cooled | Puch X30 NG-2AH, Velux
Manufacturer: GPO · Number of components: 4 pcs · Ø outlet inside: 22 mm · Ø cylinder: 40 mm · Ø cylinder: 41 mm · Area of application: Tuning · Hole pattern [mm]: 44 x 44 mm · Hole spacing outlet: 42 mm · Decompressor: Yes · Hole spacing inlet: 38 mm
EUR 10.20
swiing® ingenious Piston 41 mm (12 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 · Ø piston pin (B): 12 mm · Weight piston kit: 94 g
EUR 80.20
Explore categories from Piston
Moped fans also bought
swiing® revival Stud Bolt, Inlet/Outlet M6x30 (Grade 10.9)
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Thread type: M6x1 (standard thread) · Total length: 30 mm · Nominal diameter (thread): 6 mm · Diameter: 5.95 mm · Thread length: 12 mm · Strength class: 10.9
EUR 2.05
Motorex engine oil (gear oil) manual 450 ml
Manufacturer: Motorex · Oil type: GL4 · Viscosity (SAE): 80W · Contents: 450 ml · Gearbox type: Foot control · Gearbox type: Manual gearshift · Temperature resistance (min.): -30 - 220 °C · Area of application: Gearbox lubrication with clutch
EUR 12.50
EUR 27.78/l
GPO gasket set 40 - 41 mm cylinder fan-cooled | Puch X30 NG-2AH, Velux
Manufacturer: GPO · Number of components: 4 pcs · Ø outlet inside: 22 mm · Ø cylinder: 40 mm · Ø cylinder: 41 mm · Area of application: Tuning · Hole pattern [mm]: 44 x 44 mm · Hole spacing outlet: 42 mm · Decompressor: Yes · Hole spacing inlet: 38 mm
EUR 10.20
GPO 41 mm cylinder kit fan-cooled 10 mm KoBo | Puch X30 Velux, NG-2AH
Manufacturer: GPO · Manufacturer: Meteor Racing · Material: Gray cast iron · Area of application: Tuning · Surface: sandblasted · Displacement: 60 ccm · Crankshaft stroke: 43 mm · Nominal diameter: 41 mm · Thread inlet: M6x1 (standard thread) · Number of fixing points: 4 pcs · Hole spacing inlet: 32 mm · Ø piston pin (B): 10 mm · Outlet type: straight · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Hole pattern [mm]: 44 x 44 · Camouflaged: No
EUR 126.10
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
