38.0 mm piston with two 2 mm rectangular piston rings with flank lock (FS) for mopeds, mopeds and small motorcycles with Sachs 502/1 A, 502/1 B, 502/1 AX, 502/1 AX, 502/1 A CH, 502/1 A DK, 502/1 A NL, 502/1 A S and 502/1 A SF engine (colloquially often called torpedo or rocket engine).
The piston set fits the following models, among others:
- Hercules CB1 City Bike, L50, MF1, MF2, MP1
- Rex Miniped, Miniped MK2
- Sparta Happy
- Motograziella
- Pony City
- KTM Hobby 1968 - 1972
The piston pin is closed on one side, as on the original, so that no exhaust gases are forced back through the pin into the intake tract.
The detailed dimensioning 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.
Details
| Ø outside piston (A) | 37.94 mm |
| Ø piston pin (B) | 12 mm |
| Compression height (C) | 28 mm |
| Curvature (D) | 3 mm |
| Total piston height (E) | 53 mm |
| Number of piston rings (F) | 2 pcs |
| Nominal diameter | 38 mm |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 2 mm |
| Thick piston ring | 1.6 mm |
| Weight | 87 g |
Suitable for the following models
| Sachs | 502 1A / 1B (Torpedo) |
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Manufacturer: GPO · Material: Steel · Area of application: (Dis)assembly tool · Surface: burnished · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Total length: 130 mm · Width across flats SW: 10 mm · Width across flats SW: 17 mm · Number of components: 7 pcs
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Cylinder base and intake gasket | Sachs 502/1B
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Piston 38 mm | Sachs 50/2 1A, 1B
Ø outside piston (A): 37.94 mm · Ø piston pin (B): 12 mm · Compression height (C): 28 mm · Curvature (D): 3 mm · Total piston height (E): 53 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 38 mm · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring height: 2 mm · Thick piston ring: 1.6 mm · Weight: 87 g
EUR 67,50
Piston 38.6 mm | Sachs 50/2 1A, 1B
Ø outside piston (A): 38.54 mm · Ø piston pin (B): 12 mm · Compression height (C): 28 mm · Curvature (D): 3 mm · Total piston height (E): 53 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 38.6 mm · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring height: 2 mm · Thick piston ring: 1.6 mm · Weight: 92 g
EUR 67,50
Collection only possible with online purchase and appointment.
