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.
| 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 |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 2 mm |
| Thick piston ring | 1.6 mm |
| Ø piston pin (B) | 12 mm |
| Weight piston kit | 87 g |
| Sachs OEM no. | 0286 373 005 |
| 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 · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Width across flats: 10 mm · Width across flats: 17 mm · Total length: 130 mm · Area of application: (Dis)assembly tool
23,20 EUR
Cylinder base and intake gasket | Sachs 502/1B
Manufacturer: Made in Germany · Material: Oiled paper · Thickness: 0.35 mm · Thickness: 0.55 mm · Number of components: 2 pcs · Hole pattern [mm]: 40 x 41 mm · Hole spacing inlet: 30 mm · Sachs OEM no.: 0250 139 000 · Sachs OEM no.: 0250 140 000
11,40 EUR
Not in stock
Piston 38 mm | Sachs 50/2 1A, 1B
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 · Piston ring impact: Flank safety device (FS) · Piston ring height: 2 mm · Thick piston ring: 1.6 mm · Ø piston pin (B): 12 mm · Weight piston kit: 87 g · Sachs OEM no.: 0286 373 005
69,90 EUR
Piston 38.6 mm | Sachs 50/2 1A, 1B
Ø outside piston (A): 38.54 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 · Ø piston pin (B): 12 mm · Weight piston kit: 92 g · Sachs OEM no.: 0286 373 007
69,90 EUR
Carburetor Bing 1/10/99 (replica) | Sachs 50/2 1A, 1B
Material: Aluminum · Component group Carburetor: Carburetor complete · Nominal diameter: 10 mm · Ø Internal connection: 16 mm · Ø Air filter connection: 54.5 mm · Ø fuel hose connection: 6 mm · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.15 · Nozzle size: 56 · Total length: 65 mm · Sachs OEM no.: 0281 108 004
99,10 EUR
Carburetor Bing 1/12/182 (replica) | Sachs 502 1A, 1B
Material: Aluminum · Component group Carburetor: Carburetor complete · Nominal diameter: 12 mm · Ø Internal connection: 16 mm · Ø Air filter connection: 54.5 mm · Ø fuel hose connection: 6 mm · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 60 · Total length: 65 mm
99,10 EUR
Explore categories from Piston
Moped fans also bought
Magura cable clamp Ø 8 x 15 mm
Ø outside: 8 mm · Manufacturer: Magura · Material: Brass · Material: Steel · Surface: galvanized (blue) · Surface: nickel-plated · Ø Cable bushing: 2.3 mm · Drive: External hexagon · Drive: Slot · Screw head: Hexagon · Ø Bundle: 6 mm · Total length: 15 mm · Thread type: M6x1 (standard thread) · Thread length: 7 mm · Width across flats: 7 mm · Area of application: Standard
2,90 EUR
Magura adjusting screw brake short
Manufacturer: Magura · Material: Brass · Color: silver · Surface: nickel-plated · Drive: Knurled screw · Ø shaft: 6.1 mm · Ø External head: 9.15 mm · Total length: 31 mm · Total length: 40 mm · Thread type: MF6x0.75 (fine pitch thread) · Thread length: 15 mm · Shank length: 6.9 mm · Magura OEM number: 315 390
3,95 EUR
Karcoma fuel filter 24 mm plastic / paper
Ø inside: 4.7 mm · Ø outside: 24 mm · Manufacturer: Karcoma · Material: Paper · Material: Plastic · Color: transparent · Color: yellow · Filter type: Filter paper · demountable: No · Ø fuel hose connection: 6 mm · Ø fuel hose connection: 7.3 mm · Total length: 35 mm · Total length: 60 mm
16,20 EUR
Cylinder base and intake gasket | Sachs 502/1B
Manufacturer: Made in Germany · Material: Oiled paper · Thickness: 0.35 mm · Thickness: 0.55 mm · Number of components: 2 pcs · Hole pattern [mm]: 40 x 41 mm · Hole spacing inlet: 30 mm · Sachs OEM no.: 0250 139 000 · Sachs OEM no.: 0250 140 000
11,40 EUR
Not in stock
Working late? Evening hours on Thursday until 20:00
