38 mm aluminum cylinder with steel liner, suitable for Sachs 504, 505 & 508 engines, which were installed in Hercules Prima M, 2, 3, 4 and 5 as well as Pony City mopeds, among others.
The intake manifold is not included in the scope of delivery, but the exhaust is cast directly into it.
Notes:
For the Swiss 504 engines (42 mm stroke), the following modifications must be made to the cylinder:
- Adjust the cylinder base and gasket as shown in Figure 5 .
- The cylinder base must be turned off so that the compression is adjusted again due to the shorter stroke, we recommend setting a crushing edge of 0.8 - 1.0 mm.
- On models with an external clutch lever, the intake area must be extended, otherwise the carburetor may come into contact with the clutch lever
The workmanship of the cylinder kit is solid, but we recommend reworking the edges and thoroughly cleaning all parts before installation.
You can find the 45 km/h moped version as well as racing cylinders and intake manifolds in our accessories section.
Details
| Material | Aluminum |
| Number of fixing points | 4 pcs |
| Displacement | 50 ccm |
| Nominal diameter | 38 mm |
| Ø cylinder neck | 51.9 mm, 49.4 mm |
| Ø Outlet outside | 25.9 mm |
| Ø outlet inside | 22.5 mm |
| Hole spacing inlet | 31.5 mm |
| Inlet window | 18 x 13.4 |
| Ø piston pin (B) | 12 mm |
| Thread inlet | M6x1 (standard thread) |
| Hole pattern [mm] | 55 x 55 |
| Outlet type | straight |
| Decompressor | M10x1.5 |
Suitable for the following models
| Sachs | 504 (ohne Tretwelle) 505 (mit Tretwelle) - 1A (AT), 2 A (HG) |
| Hercules | Prima - 2, 3, 4, 5 |
Accessories & related products
Athena 38 mm cylinder kit without mounting parts | Sachs (504), 505, 508
Manufacturer: Athena · Area of application: Tuning · Material: Aluminum · Surface: sandblasted · Crankshaft stroke: 44 mm · Displacement: 50 ccm · Hole spacing inlet: 32 mm · Ø cylinder neck: 51.7 mm · Nominal diameter: 38 mm · Ø outlet inside: 28.3 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Inlet window: 23.6 x 12.8 / 16.5 · Thread inlet: M6x1 (standard thread) · Hole spacing outlet: 50 mm · Hole pattern [mm]: 56/61 x 56 · Outlet type: straight · Thread outlet: M8x1.25 (standard thread) · Decompressor: M10x1.5 · Camouflaged: No
328,80 EUR
Athena 45 mm cylinder kit incl. mounting parts | Sachs (504), 505, 508
Manufacturer: Athena · Area of application: Tuning · Material: Aluminum · Surface: sandblasted · Crankshaft stroke: 44 mm · Hole spacing inlet: 31.5 mm · Ø cylinder neck: 51.7 mm · Ø Outlet outside: 25.9 mm · Nominal diameter: 45 mm · Ø Inlet inside: 14.3 mm · Ø outlet inside: 19.5 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Inlet window: 23.4 x 12.6 · Thread inlet: M6x1 (standard thread) · Hole spacing outlet: 50 mm · Hole pattern [mm]: 56 (61) x 56 · Outlet type: clamped · Outlet type: straight · Thread outlet: M8x1.25 (standard thread) · Decompressor: M10x1.5 · Camouflaged: No
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Airsal 14 mm intake manifold angled | Sachs 504, 505
Manufacturer: Airsal · Area of application: Tuning · Material: Aluminum · Hole spacing inlet: 31 mm · Ø inside: 13.6 mm · Mounting type: Screws · Number of fixing points: 2 pcs · Height flange center hole: 56 mm · Ø External connection: 20 mm
43,50 EUR
38 mm cylinder kit 45 km/h version | Sachs (504), 505, 508
Material: Aluminum · Displacement: 50 ccm · Hole spacing inlet: 31.5 mm · Ø cylinder neck: 44.4 mm · Ø cylinder neck: 52 mm · Ø Outlet outside: 25.9 mm · Nominal diameter: 38 mm · Ø outlet inside: 22.4 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Inlet window: 23.2 x 12.8 · Thread inlet: M6x1 (standard thread) · Hole pattern [mm]: 55 x 55 · Outlet type: straight · Decompressor: M10x1.5
235,70 EUR
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swiing® revival blind screw M10x1.5 x 18 SW10 decompressor
Drive: External hexagon · Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Thread type: M10x1.5 (standard thread) · Screw head: Hexagon · Total length: 18 mm · Thread length: 10 mm · Width across flats SW: 10 mm
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AKOA 38 mm cylinder kit | Sachs 503 2AL, AAL, 2BL, ABL
Manufacturer: AKOA · Area of application: Standard · Material: Aluminum · Surface: nikasil-coated · Crankshaft stroke: 43 mm · Displacement: 50 ccm · Hole spacing inlet: 32 mm · Ø cylinder neck: 45.5 mm · Ø Outlet outside: 25.8 mm · Nominal diameter: 38 mm · Ø Inlet inside: 14 mm · Ø outlet inside: 18.5 mm · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Thread inlet: M6x1 (standard thread) · Hole pattern [mm]: 40 x 60 / 37 x 37 · Outlet type: clamped · Decompressor: No
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Collection only possible with online purchase and appointment.
