45 mm tuning cylinder with 70 cc displacement and narrow exhaust for your Pony moped / moped with Sachs 503 AB, AC or ADV engine.
The wide-bore racing kit has been extensively reworked compared to the original cylinder. The overflow channels, intake and exhaust have been enlarged. The racing cylinder is designed for high engine speeds. Due to the longer exhaust timing, a high back pressure is therefore required in order to exploit the full power.
| Nominal diameter | 45 mm |
| Manufacturer | AKOA |
| Material | Aluminum |
| Area of application | Tuning |
| Surface | varnished, Nickel silicon carbide (colloquially known as Nikasil) |
| Displacement | 70 ccm |
| Crankshaft stroke | 44 mm |
| Ø cylinder neck | 52 mm, 50.5 mm |
| Ø outlet inside | 29 mm |
| Ø Inlet inside | 23.5 mm |
| Thread inlet | M6x1 (standard thread) |
| Hole spacing inlet | 36 mm |
| Ø piston pin (B) | 12 mm |
| Outlet type | slanted |
| Hole spacing outlet | 50.5 mm |
| Thread outlet | M6x1 (standard thread) |
| Decompressor | MF12x1.25 |
| Alternative version of the Pony OEM number | A2868 |
| Sachs | 503 - AB , AC , ADV |
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