47 mm racing cylinder kit (without cylinder head) compatible with your Puch Maxi S / N, Supermaxi LG1 / LG2, as well as your X30 Sport NS / NL moped with E50 / ZA50 (air-cooled) / ZA50 (catalytic converter) or Z50 engine.
The tuning cylinder has a bore diameter of 47 mm, giving your Puch engine a displacement of 75 ccm. The cylinder bore, coated with nickel-silicon carbide (commonly known as Nikasil), ensures high wear resistance, smooth operation, and reliable emergency running characteristics.
To get the full performance out of this racing kit, a carburetor with a minimum diameter of 19 mm is recommended. The cylinder kit performs optimally with a 21 mm racing carburetor in combination with a matching racing exhaust system. Together with the aggressive valve timing of the racing cylinder, power outputs of up to 10 PS and more are possible with a properly tuned setup.
The cylinder head is not included.
Notes:
The engine block must be milled out.
Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
A quality product from the Italian manufacturer Gilardoni under the italkit brand.
| Manufacturer | Gilardoni italkit |
| Material | Aluminum |
| Camouflaged | No |
| Surface | sandblasted |
| Displacement | 75 ccm |
| Crankshaft stroke | 43 mm |
| Nominal diameter | 47 mm |
| Ø cylinder neck | 51 mm |
| Ø outlet inside | 26.5 mm |
| Ø Inlet inside | 18.3 mm |
| Inlet window | 38.5 x 25.8 mm |
| Ø piston pin (B) | 12 mm |
| Hole pattern [mm] | 44 x 44 |
| Thread inlet | M6x1 (standard thread) |
| Hole spacing inlet | 60 mm, 35.5 mm |
| Number of fixing points | 4 pcs |
| Decompressor | No |
| Area of application | Tuning |
| Outlet type | slanted |
| Hole spacing outlet | 42 mm |
| Thread outlet | M6x1 (standard thread) |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
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