
38 mm replacement piston / piston kit with two pieces of 2 mm rectangular piston rings with flank lock (FS) suitable for the windage-cooled cylinder of Sachs 50/3 & 50/4 mopeds / mopeds with square intake.
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.
The piston kit contains piston pins, piston clips and piston rings.
Corresponding assembly tools, piston rings, piston pin retainers etc. can be found under accessories.
Original Sachs spare part number: 0290 058 025
| Ø outside piston (A) | 37.94 mm |
| Compression height (C) | 28 mm |
| Curvature (D) | 2.95 mm |
| Total piston height (E) | 53 mm |
| Number of piston rings (F) | 2 pcs |
| Piston ring mold | Rectangular ring |
| Nominal diameter | 38 mm |
| Piston ring impact | Flank safety device (FS) |
| Ø piston pin (B) | 12 mm |
| Piston ring height | 2 mm |
| Piston weight | 73 g |
| Sachs | 50/3 50/4 - MLFB (2.6 PS), LKH (4.5 PS) |
Accessories & related products
38 mm cylinder kit square inlet | Sachs 50/3, 50/4
Nominal diameter: 38 mm · Material: Gray cast iron · Surface: sandblasted · Area of application: Tuning · Displacement: 50 ccm · Crankshaft stroke: 42 mm · Number of fixing points: 4 pcs · Thread inlet: M5x0.8 (standard thread) · Hole pattern [mm]: 51 x 40 · Hole spacing inlet: 31 mm · Ø piston pin (B): 12 mm · Outlet type: Union nut · Thread outlet: M35x2 (standard thread) · Camouflaged: No
EUR 159.00
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Area of application: (Dis)assembly tool · Material: Steel · Surface: burnished · Total length: 130 mm · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Width across flats SW: 10 mm · Width across flats SW: 17 mm
EUR 24.40
Moped fans also bought
Magura cable clamp Ø 8 x 15 mm
Drive: External hexagon · Drive: Slot · Manufacturer: Magura · Material: Brass · Material: Steel · Width across flats SW: 7 mm · Surface: galvanized (blue) · Surface: nickel-plated · Ø Cable bushing: 2.3 mm · Screw head: Hexagon · Ø outside: 8 mm · Thread type: M6x1 (standard thread) · Total length: 15 mm · Ø Bundle: 6 mm · Area of application: Standard · Thread length: 7 mm
EUR 3.05
OMG fuel filter metal 6 mm (removable)
Manufacturer: OMG · Material: Glass · Material: Metal · Color: gray · Color: transparent · Color: white · Filter type: Plastic net · demountable: Yes · Ø fuel hose connection: 5.6 mm · Ø fuel hose connection: 6 mm · Ø inside: 3.45 mm · Ø outside: 22 mm · Total length: 40 mm · Total length: 63 mm
EUR 8.35
swiing® revival seal Float SRE, SRC, SRF, SRA
Manufacturer: swiing® revival parts · Component group Carburetor: Sealing, revising · Material: Sealing paper · Carburetor type: SRA (1/11/31) Velux · Carburetor type: SRA (1/11/35) Velux · Carburetor type: SRC · Carburetor type: SRE · Carburetor type: SRF · Surface: blank · Ø inside: 41 mm · Ø outside: 45 mm · Thickness: 1.5 mm · Pony OEM number: A4519 · Sachs OEM no.: 0950 128 000
EUR 3.45
Magura gas cable clamp / deco cable clamp Ø 5 x 6 mm
Drive: Slot · Manufacturer: Magura · Material: Brass · Material: Steel · Number of components: 2 pcs · Surface: nickel-plated · Ø Cable bushing: 1.6 mm · Screw head: Lens head · Ø outside: 5 mm · Thread type: M4x0.7 (standard thread) · Total length: 6 mm · Thread length: 4 mm
EUR 2.45
GPO ignition plate 90 mm Bosch / DUCATI
Manufacturer: GPO · Area of application: Original · Area of application: Standard · Number of cables: 3 pcs · Material: Aluminum · Tension: 6 V · Ø inside: 18.5 mm · Ø outside: 90 mm · Cable length: 400 mm · Cable length: 500 mm · Number of fixing points: 4 pcs · Ø bolt circle: 80 mm
EUR 91.70
Magura adjusting screw brake short
Drive: Knurled screw · Manufacturer: Magura · Color: silver · Material: Brass · Surface: nickel-plated · Ø shaft: 6.1 mm · Ø External head: 9.15 mm · Thread type: MF6x0.75 (fine pitch thread) · Total length: 31 mm · Total length: 40 mm · Shank length: 6.9 mm · Thread length: 15 mm
EUR 4.15










