38 mm replacement piston with two rectangular piston rings with flank lock (FS) suitable for original windage-coated aluminum cylinders with nickel-silicon carbide coating (colloquially known as Nikasil) from Puch Maxi S / N, as well as Puch X30 Sport mopeds.
Also suitable for blued cast iron cylinders of Puch X30 NG-2A / NG-2AH, as well as Puch X30 Velux mopeds.
The detailed dimensions of the piston according to the technical drawing can be found in the details. You can also find out about the relevant piston rings, their stems and locking types on the legend in the pictures.
| Nominal diameter | 38 mm |
| Manufacturer | GPO |
| Ø outside piston (A) | 37.97 mm |
| Ø piston pin (B) | 12 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) |
| Tolerance group | 3 |
| Weight piston kit | 73 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 |
Ratings
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 · Number of components: 7 pcs · Total length: 130 mm · Width across flats: 10 mm · Width across flats: 17 mm · Area of application: (Dis)assembly tool
23,20 EUR
20,90 EUR
GPO gasket set 38 mm cylinder fan-cooled | Puch X30 NG-2AH, Velux
Manufacturer: GPO · Ø cylinder: 38 mm · Number of components: 4 pcs · Ø outlet inside: 22 mm · Hole spacing inlet: 38 mm · Hole pattern [mm]: 44 x 44 mm · Hole spacing outlet: 42 mm · Area of application: Standard · Decompressor: Yes
10,40 EUR
GPO gasket set cylinder original | Puch Maxi S, N / X30 NS, NL, N-2AH
Manufacturer: GPO · Area of application: Standard · Material: Aluminum · Material: Sealing carton · Material: Sealing paper · Number of components: 4 pcs · Ø cylinder: 38 mm · Thickness: 0.3 mm · Thickness: 0.4 mm · Thickness: 1.8 mm · Ø outlet inside: 22 mm · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Hole spacing inlet: 32 - 38 mm
8,65 EUR
Explore categories from Piston
Moped fans also bought
Hot 
BERU spark plug connector / 1 kΩ interference suppressed
Manufacturer: BERU · Material: Sheet metal (steel) · Ø cable: 5 mm · Ø cable: 7 mm · Color: silver · Spark plug socket: M4 · Cable available: No · Suppressed: Yes · Resistance: 1000 Ω · Subcategory: Spark plug connector · Pony OEM number: A2099 · Sachs OEM no.: 0265 100 00
10,30 EUR
Magura cable clamp Ø 8 x 15 mm
Ø outside: 8 mm · Manufacturer: Magura · Area of application: Standard · Material: Brass · Material: Steel · Surface: galvanized (blue) · Surface: nickel-plated · Thread type: M6x1 (standard thread) · Ø Cable bushing: 2.3 mm · Drive: External hexagon · Drive: Slot · Total length: 15 mm · Screw head: Hexagon · Ø Bundle: 6 mm · Thread length: 7 mm · Width across flats: 7 mm
2,90 EUR
GPO 38 mm cylinder head original | Puch Maxi S, N / X30 NS, NL, N-2AH
Manufacturer: GPO · Area of application: Standard · Material: Aluminum · Surface: sandblasted · Ø cylinder: 38 mm · Number of fixing points: 4 pcs · Total length: 135 mm · Width: 125 mm · Height: 55 mm · Hole pattern [mm]: 44 x 44 · Candle thread: short · Decompressor: No
38,40 EUR
swiing® revival gasket set Z50 engine | Puch X30 NS / NL
Manufacturer: swiing® revival parts · Material: Sealing paper · Number of components: 10 pcs · Ø outlet inside: 22 mm · Hole spacing inlet: 32 - 38 mm · Hole pattern [mm]: 44 x 44 · Hole spacing outlet: 42 mm · Area of application: Standard
23,20 EUR
GPO gasket set | Puch E50
Manufacturer: GPO · Area of application: Standard · Material: Aluminum · Material: Fiber · Material: Sealing carton · Material: Sealing paper · Number of components: 7 pcs · Ø outlet inside: 19.9 mm · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 · Decompressor: Yes · Hole spacing inlet: 32 - 38 mm
11,60 EUR
swiing® revival stud bolt set M6 x 106 | Puch
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Thread type: M6x1 (standard thread) · Drive: External hexagon · Total length: 106 mm · Diameter: 5.9 mm · Thread length: 13 mm · Thread length: 18.5 mm · Width across flats: 10 mm · Alternative version of the Puch OEM number: 360.1.10.034.1
8,65 EUR
swiing® revival screw set engine galvanized | Puch Maxi
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Drive: Cross recess · Drive: Hexagon socket · Screw head: Countersunk head · Screw head: Cylinder head · Screw head: Lens head · Puch OEM number: 900.1216 · Puch OEM number: 901.1308
11,60 EUR
GPO Piston 38 mm No. 2 | Puch
Nominal diameter: 38 mm · Manufacturer: GPO · Ø outside piston (A): 37.96 mm · Ø piston pin (B): 12 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) · Tolerance group: 2 · Weight piston kit: 79 g
39,60 EUR
GPO Piston 38 mm No. 1 | Puch
Nominal diameter: 38 mm · Manufacturer: GPO · Ø outside piston (A): 37.95 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: 1 · Weight piston kit: 74 g
39,60 EUR
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
