First-class racing set with 64 cc displacement &ndash
| Manufacturer | Polini |
| Material | Aluminum |
| Surface | Nickel silicon carbide (known as Nikasil®) |
| Displacement | 65 ccm |
| Nominal diameter | 43.5 mm |
| Crankshaft stroke | 43 mm |
| Ø piston pin (B) | 12 mm |
| Ø cylinder neck | 48 mm |
| Camouflaged | No |
| Ø outlet inside | 22 mm |
| Hole spacing inlet | 32 mm, 39 mm |
| Inlet window | 26 x 21 |
| Area of application | Tuning, Racing |
| Thread inlet | M5x0.8 (standard thread) |
| Outlet type | straight |
| Hole spacing outlet | 42 mm |
| Number of fixing points | 4 pcs |
| Thread outlet | M6x1 (standard thread) |
| Hole pattern [mm] | 44 x 44 |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
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Polini 43.5 mm cylinder head | Puch
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Polini intake system 4-folding diaphragm "Big Valve" PHBG / CP carburetor | Puch
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swiing® ingenious crankshaft "High End" with mounted bearings | Puch E50
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