38 mm replacement piston with two rectangular piston rings featuring flank protection (FS), compatible with original air-cooled aluminum cylinders with a nickel-silicon carbide coating (commonly known as Nikasil) from Puch Maxi S / N, as well as Puch X30 Sport mopeds.
Also compatible with fan-cooled gray cast iron cylinders from Puch X30 NG-2A / NG-2AH, as well as Puch X30 Velux mopeds.
You can find the detailed dimensions of the piston according to the technical drawing in the details section. You can also find information about the standard piston rings, their clearances, and retaining methods in the legend accompanying the images.
Tolerance Number 2
The piston kit includes piston pins, piston clips, and piston rings.
You’ll find the necessary installation tools, piston pin retainers, and, if needed, the corresponding cylinder in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
| Nominal diameter | 38 mm |
| Manufacturer | GPO |
| Ø outside piston (A) | 37.96 mm |
| Compression height (C) | 22.7 mm |
| Curvature (D) | 3.3 mm |
| Total piston height (E) | 55 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 |
| Tolerance group | 2 |
| Weight piston kit | 79 g |
| Puch | E50 ZA50 (air-cooled) ZA50 (fan-cooled) Z50 (X30 Sport) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Surface: burnished · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Total length: 130 mm · Width across flats: 10 mm · Width across flats: 17 mm · Number of components: 7 pcs · Area of application: (Dis)assembly tool
EUR 23.60
GPO gasket set 38 mm cylinder fan-cooled | Puch X30 NG-2AH, Velux
Manufacturer: GPO · Ø cylinder: 38 mm · Ø outlet inside: 22 mm · Hole spacing inlet: 38 mm · Number of components: 4 pcs · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Standard
EUR 10.60
GPO gasket set cylinder original | Puch Maxi S, N / X30 NS, NL, N-2AH
Thickness: 0.39 mm · Thickness: 0.4 mm · Thickness: 0.45 mm · Thickness: 1.7 mm · Manufacturer: GPO · Material: Aluminum · Material: Sealing paper · Ø cylinder: 38 mm · Ø outlet inside: 20 mm · Hole spacing inlet: 32 - 38 mm · Number of components: 4 pcs · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Standard
EUR 8.80
Explore categories from Piston
Moped fans also bought
GPO Gasket Set for E50 Engine | Puch Maxi S, N
Material: Aluminum · Material: Fiber · Material: Sealing carton · Material: Sealing paper · Manufacturer: GPO · Ø outlet inside: 19.9 mm · Hole spacing inlet: 32 - 38 mm · Hole pattern [mm]: 44 x 44 · Decompressor: Yes · Number of components: 7 pcs · Hole spacing outlet: 42 mm · Area of application: Standard
EUR 11.80
Hot 
Gas cable Ø 1.25 mm x 220 cm (cylindrical nipple) Bing
Material: Steel · Ø nipple: 3 mm · Nipple length: 5 mm · Manufacturer: Made in Germany · Surface: galvanized (blue) · Ø Stranded wire: 1.25 mm · Cable length: 2200 mm · Nipple shape: Cylinder · Number of components: 1 pcs · Area of application: Standard
EUR 2.85
swiing® revival bottom bracket bushing nylon | Puch Maxi, X30 Sport, Velux, NG-2AH
Material: Nylon · Bearing type: Plain bearing · Color: black · Total length: 19 mm · Manufacturer: swiing® revival parts · Ø outside: 20.2 mm · Ø inside: 16.2 mm · Ø Bundle: 24.1 mm · Puch OEM number: 349.1.42.005.1
EUR 2.95
Hot
Inner cable set automatic | Puch E50
Manufacturer: Made in Germany · Material: Steel · Quantity: 4 pcs · Ø Stranded wire: 1.25 mm · Ø Stranded wire: 1.5 mm · Ø Stranded wire: 1.8 mm · Total length: 1600 mm · Total length: 2200 mm · Nipple shape: Barrel (transverse) · Nipple shape: Cylinder · Nipple shape: Pears
EUR 11.80
GPO gasket set 38 mm cylinder fan-cooled | Puch X30 NG-2AH, Velux
Manufacturer: GPO · Ø cylinder: 38 mm · Ø outlet inside: 22 mm · Hole spacing inlet: 38 mm · Number of components: 4 pcs · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Standard
EUR 10.60
GPO 38 mm Cylinder Kit, Fan-Cooled, 12 mm KoBo | Puch Velux, NG-2AH
Nominal diameter: 38 mm · Manufacturer: GPO · Material: Gray cast iron · Surface: sandblasted · Crankshaft stroke: 43 mm · Displacement: 50 ccm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Thread inlet: M6x1 (standard thread) · Hole pattern [mm]: 44 x 44 · Hole spacing inlet: 32 mm · Outlet type: straight · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Area of application: Tuning · Camouflaged: No
EUR 100.70
Working late? Evening hours on Thursday until 20:00
