Cylinder kit suitable for your Hercules Prima M, 2, 3, 4, 5 or Optima moped / moped with Sachs 505, 535 and 504 / 508 (with modifications) engine
.Thanks to the large intake, the exhaust ports and the exhaust, this racing kit ensures a considerable increase in performance.
Scope of delivery according to figure 1.
Notes:
- Always use spark plugs with a long thread.
- Adjustments must be made to the cylinder on the 504 / 508 engines (42 mm stroke): Adaptation of cylinder base and gasket according to Figure 5.
| Manufacturer | Athena |
| Material | Aluminum |
| Surface | sandblasted |
| Nominal diameter | 38 mm |
| Camouflaged | No |
| Displacement | 50 ccm |
| Crankshaft stroke | 44 mm |
| Ø cylinder neck | 51.7 mm |
| Ø outlet inside | 28 mm |
| Inlet window | 23.4 x 13 |
| Ø piston pin (B) | 12 mm |
| Hole pattern [mm] | 56 (61) x 56 |
| Thread inlet | M6x1 (standard thread) |
| Hole spacing inlet | 31.5 mm |
| Number of fixing points | 4 pcs |
| Outlet type | straight, clamped |
| Hole spacing outlet | 50 mm |
| Thread outlet | M8x1.25 (standard thread) |
| Decompressor | M10x1.5 |
| Area of application | Tuning |
| Sachs | 505 (with pedal shaft) - 1A (AT) , 2A (HG) 508 535 |
| Hercules | Great - 2 , 3 , 4 , 5 , Optima |
Ratings
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Athena 38 mm cylinder kit without mounting parts | Sachs 504, 505, 508, 535
Nominal diameter: 38 mm · Manufacturer: Athena · Material: Aluminum · Camouflaged: No · Area of application: Tuning · Surface: sandblasted · Displacement: 50 ccm · Crankshaft stroke: 44 mm · Ø cylinder neck: 51.7 mm · Ø outlet inside: 28.3 mm · Number of fixing points: 4 pcs · Inlet window: 23.6 x 12.8 / 16.5 · Thread inlet: M6x1 (standard thread) · Hole pattern [mm]: 56/61 x 56 · Hole spacing inlet: 32 mm · Ø piston pin (B): 12 mm · Outlet type: straight · Hole spacing outlet: 50 mm · Thread outlet: M8x1.25 (standard thread) · Decompressor: M10x1.5
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Athena piston 38 mm #A | Sachs 504, 505
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NGK B7ES spark plug long thread
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Meteor piston ring 38 x 1.5 (IS) | Sachs 503 AB, AC
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Manufacturer: NGK · Candle designation: BR7EIX · Area of application: High End · Area of application: MX · Area of application: Racing · Area of application: Tuning · Candle thread type: long · Spark plug socket: M4 · Spark plug socket: SAE · Electrode material: Iridium · Suppressed: Yes · Thread type: MF14x1.25 (fine pitch thread) · Width across flats: 21 mm
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