38 mm cylinder with diaphragm control for Sachs 2-, 3- and 4-speed engines with blower control, which were installed in Hercules 50/ALS, 50/2 S, 50/KS, 50/2 DK, 50/3 LS, 50/4 LKS, Gritzner etc.
Outlet thread: M35 x 2 mm
Ø outside: approx. 92 mm
Ø raceway: 38.01 mm
Ø piston: 37.94 mm
Pin spacing: 51 x 40 mm
Matching attachments can be found in the accessories section.
Good, inexpensive standard spare 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 · Piston weight: 78 g
Hole pattern [mm]: 51 x 40 · Manufacturer: GPO · Material: Gray cast iron · Surface: sandblasted · Displacement: 50 ccm · Crankshaft stroke: 42 mm · Nominal diameter: 38 mm · Thread inlet: M5x0.8 (standard thread) · Hole spacing inlet: 67 mm · Ø piston pin (B): 12 mm · Outlet type: Union nut · Thread outlet: M35x2 (standard thread) · Number of fixing points: 4 pcs · Camouflaged: No · Area of application: Tuning
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
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
| Nominal diameter | 38 mm |
| Manufacturer | GPO |
| Material | Gray cast iron |
| Surface | sandblasted |
| Displacement | 50 ccm |
| Crankshaft stroke | 42 mm |
| Ø piston pin (B) | 12 mm |
| Area of application | Tuning |
| Hole pattern [mm] | 51 x 40 / 37 x 37 |
| Thread inlet | M5x0.8 (standard thread) |
| Hole spacing inlet | 67 mm |
| Number of fixing points | 4 pcs |
| Outlet type | Union nut |
| Thread outlet | M35x2 (standard thread) |
| Camouflaged | No |
| Sachs | 50 (Fahrtwind, 1.25 / 1.5 hp, DE) 50/3 50/4 - MLFB (2.6 PS), LKH (4.5 PS) |
Accessories & related products
Diaphragm insert Sachs 50/2
Ø mounting hole: 5.2 mm · Material: Brass · Area of application: Standard · Number of flaps: 2 pcs · Membrane material: Spring steel · Number of fixing points: 2 pcs · Hole spacing: 67 mm · Mounting type: Screws · Pony OEM number: A2624 · Sachs OEM no.: 0286 213 010
CHF 28.90
GPO piston 38 mm | Sachs 50/3, 50/4 fan-cooled
Manufacturer: GPO · Nominal diameter: 38 mm · Thick piston ring: 2 mm · Ø outside piston (A): 37.94 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 · Ø piston pin (B): 12 mm · Piston weight: 78 g · Alternative version of the Sachs OEM number: 0290 058 025
CHF 33.90
Hot 
swiing® ingenious intermediate flange 17 mm diaphragm | Sachs 502, 50/2, 50/3, 50/4
Manufacturer: swiing® ingenious parts · Material: Aluminum · Material: Steel · Surface: anodized · Surface: galvanized (blue) · Thread type: M5x0.8 (standard thread) · Number of flaps: 2 pcs · Ø inside: 17 mm · Hole spacing: 31 mm · Hole spacing: 67 mm · Width: 80 mm · Total length: 29 mm · Area of application: Tuning · Mounting type: Screws · Thickness: 6.9 mm · Number of fixing points: 4 pcs
CHF 49.90
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 · Ø inside: 12 mm · Thread type: M5x0.8 (standard thread) · Area of application: Standard · Mounting type: Screws · Number of fixing points: 4 pcs · Hole spacing: 31 mm · Hole spacing: 67 mm
CHF 54.90
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 · Ø inside: 13 mm · Thread type: M5x0.8 (standard thread) · Area of application: Standard · Area of application: Tuning · Mounting type: Screws · Number of fixing points: 4 pcs · Hole spacing: 31 mm · Hole spacing: 67 mm
CHF 59.90
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swiing® revival stud bolt M5 x 23 mm inlet (diaphragm) 10.9 | Sachs 50/2 (A3700)
Manufacturer: swiing® revival parts · Diameter: 4.9 mm · Material: Steel · Surface: galvanized (blue) · Area of application: Standard · Thread type: M5x0.8 (standard thread) · Total length: 23 mm · Thread length: 6 mm · Thread length: 12 mm · Pony OEM number: A3700 · Sachs OEM no.: 0640 016 101 · Sachs OEM no.: 0640 016 102
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GPO piston 38 mm | Sachs 50/3, 50/4 fan-cooled
Manufacturer: GPO · Nominal diameter: 38 mm · Thick piston ring: 2 mm · Ø outside piston (A): 37.94 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 · Ø piston pin (B): 12 mm · Piston weight: 78 g · Alternative version of the Sachs OEM number: 0290 058 025
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swiing® revival ball bearing countershaft | Sachs 50/2, 50/3, 50/4, 503 2AL/2BL (A2531)
Material: Steel · Bearing cage: "-" Sheet steel cage ball-guided · Inner ring width: 25.6 mm · Manufacturer: swiing® revival parts · Bearing clearance: CN (standard) · Stock number: E15 · Area of application: High End · Area of application: Standard · Bearing type: Deep groove ball bearing · Thread type: MF20.8x1 LH (fine/left-hand thread) · Ø outside: 35 mm · Width: 8 mm · Ø inside: 15 mm · Pony OEM number: A2531 · Sachs OEM no.: 0286 079 105
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