
38 mm aluminum cylinder with steel liner, suitable for Sachs 504, 505 & 508 engines, which were installed in Hercules Prima M, 2, 3, 4, 5, Optima and Pony City mopeds / mopeds, among others.
| Nominal diameter | 38 mm |
| Material | Aluminum |
| Displacement | 50 ccm |
| Ø cylinder neck | 52 mm, 44.4 mm |
| Ø Outlet outside | 25.9 mm |
| Ø outlet inside | 22.4 mm |
| Hole spacing inlet | 31.5 mm |
| Inlet window | 23.2 x 12.8 |
| Ø piston pin (B) | 12 mm |
| Thread inlet | M6x1 (standard thread) |
| Hole pattern [mm] | 55 x 55 |
| Number of fixing points | 4 pcs |
| Outlet type | straight |
| Decompressor | M10x1.5 |
| Sachs | 504 (without pedal shaft) 505 (with pedal shaft) - 1A (AT), 2A (HG) |
| Hercules | Great - 2, 3, 4, 5, Optima |
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