First-class racing kit with 64 cc displacement – the preferred choice of many racers with Puch mopeds / mopeds.
The cylinder fits your Maxi with E50 engine or X30 Sport with Z50 engine, among others.
In combination with the supplied 2-valve reed valve system, the racing cylinder will give you plenty of torque even from low revs. Thanks to the use of a single piston ring, the tuning cylinder is also extremely high revving and aggressive. The performance often exceeds that of 45 mm cylinder heads. The workmanship is high quality and the nickel-silicon carbide coating (colloquially known as Nikasil) ensures durability and longevity.
In addition to the cylinder head, the scope of delivery also includes the piston, clips, bolts and a piston ring. The base and head gasket and the complete diaphragm system are also included.
| Nominal diameter | 43.5 mm |
| Manufacturer | Polini |
| Material | Aluminum |
| Camouflaged | No |
| Area of application | Tuning, Racing |
| Surface | Nickel silicon carbide (colloquially known as Nikasil) |
| Displacement | 65 ccm |
| Crankshaft stroke | 43 mm |
| Ø piston pin (B) | 12 mm |
| Ø cylinder neck | 48 mm |
| Hole spacing inlet | 32 mm, 39 mm |
| Inlet window | 26 x 21 |
| Hole pattern [mm] | 44 x 44 |
| Ø outlet inside | 22 mm |
| Thread inlet | M5x0.8 (standard thread) |
| Hole spacing outlet | 42 mm |
| Number of fixing points | 4 pcs |
| Outlet type | straight |
| Thread outlet | M6x1 (standard thread) |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
Ratings
Accessories & related products
GPO 43.5 mm cylinder head with O-ring, Polini Tuning new version | Puch
Manufacturer: GPO · Material: Aluminum · Surface: sandblasted · Ø cylinder: 43.5 mm · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Candle thread: short · Decompressor: No · Total length: 140 mm · Width: 135 mm · Height: 55 mm · Area of application: Tuning
62,90 EUR
Polini piston 43.5 mm type A | Puch
Manufacturer: Polini · Nominal diameter: 43.5 mm · Ø outside piston (A): 43.45 mm · Ø piston pin (B): 12 mm · Compression height (C): 23 mm · Curvature (D): 3.6 mm · Total piston height (E): 50.55 mm · Number of piston rings (F): 1 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.2 mm · Tolerance group: A · Weight piston kit: 93 g
110,70 EUR
Membrane transpacer Polini Trapez 12 mm aluminum | Puch ZA50
Ø mounting hole: 5.4 mm · Material: Aluminum · Surface: blank · Number of fixing points: 4 pcs · Hole pattern [mm]: 32 / 36 x 39 · Total length: 50 mm · Width: 42.5 mm · Width: 46 mm · Thickness: 12 mm · Area of application: Tuning · Mounting type: Screws
34,90 EUR
Membrane transpacer Polini Trapez 6 mm aluminum | Puch ZA50
Ø mounting hole: 5.4 mm · Material: Aluminum · Surface: blank · Number of fixing points: 4 pcs · Hole pattern [mm]: 32 / 36 x 39 · Total length: 50 mm · Width: 46 mm · Thickness: 6.15 mm · Area of application: Tuning · Mounting type: Screws
31,40 EUR
Polini 43.5 mm cylinder kit reed valve with head | Puch
Surface: Nickel silicon carbide (colloquially known as Nikasil) · Manufacturer: Polini · Number of fixing points: 4 pcs · Area of application: Racing · Area of application: Tuning · Material: Aluminum · Displacement: 65 ccm · Crankshaft stroke: 43 mm · Ø piston pin (B): 12 mm · Nominal diameter: 43.5 mm · Ø cylinder neck: 48 mm · Ø outlet inside: 22 mm · Inlet window: 26 x 21 · Thread inlet: M5x0.8 (standard thread) · Hole spacing inlet: 32 mm · Hole spacing inlet: 39 mm · Outlet type: straight · Hole pattern [mm]: 44 x 44 · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Camouflaged: No
466,70 EUR
Polini 43.5 mm cylinder head | Puch
Total length: 145 mm · Height: 48 mm · Width: 135 mm · Manufacturer: Polini · Material: Aluminum · Ø cylinder: 43.5 mm · Hole pattern [mm]: 44 x 44 · Candle thread: long · Number of fixing points: 4 pcs · Decompressor: No · Area of application: Racing · Area of application: Tuning
93,20 EUR
Polini intake system 4-folding diaphragm "Big Valve" PHBG / CP carburetor | Puch
Manufacturer: Polini · Area of application: Racing · Area of application: Tuning · Material: Aluminum · Material: Plastic · Surface: glass bead blasted · Ø inside: 28.6 mm · Number of flaps: 4 pcs · Ø mounting hole: 5.2 mm · Ø outside: 24 mm · Membrane material: Carbonite · Thick membrane platelets: 0.3 mm · Mounting type: Screws · Number of fixing points: 4 pcs · Thread type: M5x0.8 (standard thread) · Camouflaged: No
163,30 EUR
New
Hot 
43.5 mm cylinder head CNC Tuning | Puch E50
Manufacturer: Made in Switzerland · Material: Aluminum · Ø cylinder: 43.5 mm · Total length: 169 mm · Width: 164 mm · Height: 50.6 mm · Number of fixing points: 4 pcs · Candle thread: short · Hole pattern [mm]: 44 x 44 · Decompressor: No · Area of application: Tuning
221,60 EUR
Not in stock
Explore categories from Cylinder
Moped fans also bought
Hot
Gas cable Ø 1.25 mm x 220 cm (cylindrical nipple) Bing
Ø nipple: 3 mm · Manufacturer: Made in Germany · Material: Steel · Number of components: 1 pcs · Ø Stranded wire: 1.25 mm · Surface: galvanized (blue) · Cable length: 2200 mm · Nipple shape: Cylinder · Nipple length: 5 mm · Area of application: Standard
2,80 EUR
GPO 43.5 mm cylinder head with O-ring, Polini Tuning new version | Puch
Manufacturer: GPO · Material: Aluminum · Surface: sandblasted · Ø cylinder: 43.5 mm · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Candle thread: short · Decompressor: No · Total length: 140 mm · Width: 135 mm · Height: 55 mm · Area of application: Tuning
62,90 EUR
Polini CP 19 mm carburetor (hand choke)
Manufacturer: Polini · Camouflaged: No · Component group Carburetor: Carburetor complete · Material: Aluminum · Carburetor type: CP · Nominal diameter: 19 mm · Ø Internal connection: 24 mm · Ø without reducing sleeve: 26 mm · Ø Inside entrance: 19 mm · Ø Output inside: 19 mm · Ø Air filter connection: 46 mm · Ø fuel hose connection: 6 mm · Ø fuel hose connection: 7 mm · Mixed oil connection: Yes · Vacuum connection: Yes · Choke control: Hand choke · Nozzle thread: M5x0.8 (standard thread) · Nozzle block: 35-12 · Nozzle size: 66 · Size of secondary nozzle: 42 · Mounting type: Plug connection clamped · Total length: 73.5 mm · Width: 66 mm · Height: 135 mm · Area of application: High End · Area of application: Performance · Area of application: Racing · Area of application: Tuning
163,30 EUR
Hot
swiing® ingenious crankshaft "High End" with mounted bearings | Puch E50
Manufacturer: swiing® ingenious parts · Material: Aluminum · Material: Steel · Cheek type: Full cheeks · Crankshaft stroke: 43 mm · Connecting rod length center-center: 90 mm · Total length of crankpin on clutch side: 74 mm · Total length crankpin ignition side: 66 mm · Ø crank webs: 69.9 mm · Ø piston pin (B): 12 mm · Ø Connecting rod eye: 15 mm · Ø Bearing seat (clutch side): 17 mm · Ø Bearing seat (ignition side): 17 mm · Thread type: MF10x1 (fine pitch thread) · Thread length: 11 mm · Thread length: 15 mm · Dimension needle bearing: 12 / 15 x 14.2 mm (axe 12) · Wide crank webs: 34 mm · Length 1st paragraph: 9 mm · Length 2nd paragraph: 14.5 mm · Length 3rd paragraph: 25 mm · Ø 1st step (on the coupling side): 22 mm · Ø 2nd shoulder (on the clutch side): 17 mm · Ø 3rd step (on the clutch side): 15 mm · Length of shoulder (ignition side): 26.3 mm · Weight: 968 g · Number of gears: 1 pcs · Area of application: High End · Area of application: Racing · Area of application: Tuning
209,90 EUR
Polini intake system 4-folding diaphragm "Big Valve" PHBG / CP carburetor | Puch
Manufacturer: Polini · Area of application: Racing · Area of application: Tuning · Material: Aluminum · Material: Plastic · Surface: glass bead blasted · Ø inside: 28.6 mm · Number of flaps: 4 pcs · Ø mounting hole: 5.2 mm · Ø outside: 24 mm · Membrane material: Carbonite · Thick membrane platelets: 0.3 mm · Mounting type: Screws · Number of fixing points: 4 pcs · Thread type: M5x0.8 (standard thread) · Camouflaged: No
163,30 EUR
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
