38 mm cylinder with diaphragm control for Sachs 2-, 3-, and 4-speed engines with forced-air cooling, which were installed in models such as the Hercules 50/ALS, 50/2 S, 50/KS, 50/2 DK, 50/3 LS, 50/4 LKS, Gritzner, etc.
Exhaust thread: M35 x 2 mm
; Outer diameter: approx. 92 mm
; Bore diameter: 38.01 mm
; Piston diameter: 37.94 mm
; Stud spacing: 51 x 40 mm
Note: Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust port on the exhaust side.
You can find the matching cylinder head and other mounting parts in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
Manufacturer: GPO · Nominal diameter: 38 mm · Ø outside piston (A): 37.94 mm · Ø piston pin (B): 12 mm · Compression height (C): 27.5 mm · Curvature (D): 3.5 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: 1.7 mm · Thick piston ring: 2 mm · Alternative version of the Sachs OEM number: 0290 058 025 · Weight piston kit: 78 g
Camouflaged: No · Manufacturer: GPO · Material: Gray cast iron · Surface: sandblasted · Displacement: 50 ccm · Crankshaft stroke: 42 mm · Nominal diameter: 38 mm · Hole spacing inlet: 67 mm · Outlet type: Union nut · Number of fixing points: 4 pcs · Area of application: Tuning, Racing
Hole pattern [mm]: 51 x 40 mm · Number of components: 4 pcs · Hole spacing inlet: 31 mm · Ø outlet inside: 28 - 32 mm · Area of application: Standard, Tuning
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Area of application: Standard · Diameter: 4.9 mm · Thread type: M5x0.8 (standard thread) · Total length: 23 mm · Thread length: 6 mm, 12 mm · Pony OEM number: A3700 · Sachs OEM no.: 0640 016 101, 0640 016 102 · Nominal diameter (thread): 5 mm
Manufacturer: swiing® revival parts · Material: Oiled paper · Thickness: 0.4 mm · Hole spacing inlet: 67 mm · Pony OEM number: A1840 · Sachs OEM no.: 0250 106 00
| Sachs | 50 (Fahrtwind, 1.25 / 1.5 hp, DE) 50/3 50/4 - MLFB (2.6 PS) , LKH (4.5 PS) |
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Diaphragm insert Sachs 50/2
Material: Brass · Number of flaps: 2 pcs · Membrane material: Spring steel · Hole spacing: 67 mm · Ø mounting hole: 5.2 mm · Mounting type: Screws · Number of fixing points: 2 pcs · Area of application: Standard · Pony OEM number: A2624 · Sachs OEM no.: 0286 213 010
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GPO piston 38 mm | Sachs 50/2, 50/3, 50/4 fan-cooled
Manufacturer: GPO · Nominal diameter: 38 mm · Thick piston ring: 2 mm · Ø outside piston (A): 37.94 mm · Ø piston pin (B): 12 mm · Compression height (C): 27.5 mm · Curvature (D): 3.5 mm · Total piston height (E): 53 mm · Number of piston rings (F): 2 pcs · Piston ring impact: Flank safety device (FS) · Piston ring mold: Rectangular ring · Piston ring height: 1.7 mm · Weight piston kit: 78 g · Alternative version of the Sachs OEM number: 0290 058 025
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swiing® ingenious intermediate flange 12 mm diaphragm | Sachs 502, 50/2, 50/3, 50/4
Manufacturer: swiing® ingenious parts · Material: Aluminum · Surface: anodized · Number of flaps: 2 pcs · Hole spacing: 31 mm · Hole spacing: 67 mm · Thread type: M5x0.8 (standard thread) · Ø inside: 12 mm · Mounting type: Screws · Number of fixing points: 4 pcs · Area of application: Standard
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swiing® ingenious intermediate flange 13 mm diaphragm | Sachs 502, 50/2, 50/3, 50/4
Manufacturer: swiing® ingenious parts · Material: Aluminum · Surface: anodized · Number of flaps: 2 pcs · Hole spacing: 31 mm · Hole spacing: 67 mm · Thread type: M5x0.8 (standard thread) · Ø inside: 13 mm · Mounting type: Screws · Number of fixing points: 4 pcs · Area of application: Standard · Area of application: Tuning
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