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 |
| 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 |
| Ø piston pin (B) | 12 mm |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 2 mm |
| Thick piston ring | 1.6 mm |
| Piston weight | 87 g |
Suitable for the following models
| Sachs | 502 1A / 1B (torpedo) |
| Hercules | |
| KTM | |
| Motograziella |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Surface: burnished · Area of application: (Dis)assembly tool · Number of components: 7 pcs · Total length: 130 mm · Width across flats SW: 10 mm · Width across flats SW: 17 mm · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm
EUR 24.30
Cylinder base and intake gasket | Sachs 502/1B
Manufacturer: Made in Germany · Material: Oiled paper · Number of components: 2 pcs · Thickness: 0.35 mm · Thickness: 0.55 mm · Hole spacing inlet: 30 mm · Hole pattern [mm]: 40 x 41 mm · Sachs OEM no.: 0250 139 000 · Sachs OEM no.: 0250 140 000
EUR 12.00
Not in stock
Piston 38 mm | Sachs 50/2 1A, 1B
Nominal diameter: 38 mm · 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 · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring height: 2 mm · Thick piston ring: 1.6 mm · Piston weight: 87 g
EUR 73.00
Piston 38.6 mm | Sachs 50/2 1A, 1B
Nominal diameter: 38.6 mm · 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 · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring height: 2 mm · Thick piston ring: 1.6 mm · Piston weight: 92 g
EUR 73.00
Moped fans like you also bought:
Magura cable clamp Ø 8 x 15 mm
Manufacturer: Magura · Ø Cable bushing: 2.3 mm · Material: Brass · Material: Steel · Surface: galvanized (blue) · Surface: nickel-plated · Thread type: M6x1 (standard thread) · Drive: External hexagon · Drive: Slot · Ø Bundle: 6 mm · Screw head: Hexagon · Ø outside: 8 mm · Total length: 15 mm · Area of application: Standard · Thread length: 7 mm · Width across flats SW: 7 mm
EUR 3.05
Magura adjusting screw brake short
Manufacturer: Magura · Material: Brass · Surface: nickel-plated · Color: silver · Drive: Knurled screw · Thread type: MF6x0.75 (fine pitch thread) · Total length: 31 mm · Total length: 40 mm · Ø shaft: 6.1 mm · Ø External head: 9.15 mm · Shank length: 6.9 mm · Thread length: 15 mm
EUR 4.15
Decompressor cable Ø 1.5 mm x 180 cm (pear-shaped nipple)
Ø nipple: 3.3 mm · Ø nipple: 5 mm · Manufacturer: Made in Germany · Material: Steel · Surface: galvanized (blue) · Area of application: Standard · Ø Stranded wire: 1.5 mm · Nipple shape: Pears · Cable length: 1800 mm · Nipple length: 7 mm · Pony OEM number: P0919
EUR 2.90
Alligator end piece for indoor cable, aluminum (per piece)
Ø inside: 2.2 mm · Ø outside: 3.1 - 4 mm · Number of connections: 1 pcs · Manufacturer: Alligator · Material: Aluminum · Surface: raw · Area of application: Standard · Color: silver · Number of components: 1 pcs · Total length: 12 mm
EUR 0.50
Fuel tap vertical M16x1 (with union nut) outgoing at the bottom
Manufacturer: GPO · Possible lever positions: open / closed / reserve · Material lever: Metal · Filter type: Plastic net · Installation direction: vertical / vertical · Outlet direction: below · Thread type: MF16x1 (fine pitch thread) · Mounting type: Union nut · Spare tube shape: straight · Ø fuel hose connection: 6 mm · Reserve level: 90 mm
EUR 24.30
Cylinder base and intake gasket | Sachs 502/1B
Manufacturer: Made in Germany · Material: Oiled paper · Number of components: 2 pcs · Thickness: 0.35 mm · Thickness: 0.55 mm · Hole spacing inlet: 30 mm · Hole pattern [mm]: 40 x 41 mm · Sachs OEM no.: 0250 139 000 · Sachs OEM no.: 0250 140 000
EUR 12.00
Not in stock
Collection only possible with online purchase and appointment.
