41 mm gray cast iron tuning cylinder with diaphragm control, suitable for your moped, scooter, or small motorcycle equipped with a manual transmission and fan-cooled Sachs 50/2 (DE), 50/3 (DE), or 50/4 (DE) engine.
This diaphragm cylinder is suitable 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, and other small motorcycles.
The robust gray cast iron cylinder provides a tuning base suitable for everyday use. Even with a diameter of 41 mm, you’ll experience a significant performance boost that’s noticeable during daily riding. The diaphragm control, in combination with the appropriate mounting parts, enables a clean fuel-air mixture flow and makes the cylinder an exciting tuning option for fan-cooled Sachs engines.
Bore pattern: 51x40 mm
; Exhaust thread: M35x2
; Intake thread: M5x0.8
Note: The cylinder is shipped loose and without a piston, gasket set, studs, diaphragm gaskets, or other mounting parts.
You can find the matching cylinder head, piston, gasket set, diaphragm insert, and other components in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
| Manufacturer | GPO |
| Material | Gray cast iron |
| Surface | sandblasted |
| Displacement | 55 ccm |
| Crankshaft stroke | 42 mm |
| Nominal diameter | 41 mm |
| Hole spacing inlet | 67 mm |
| Camouflaged | No |
| Number of fixing points | 4 pcs |
| Outlet type | Union nut |
| Area of application | Tuning, Racing |
| 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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