Hot 
The legend is now back even bigger! The legendary Metrakit racing cylinder from days gone by has risen from the ashes like a phoenix in the 45 mm version and ignites a new fire in your Puch Maxi S, N, X30 Sport NS, NL and Supermaxi LG1 and LG2 mopeds.
The aluminium cylinder with grey cast iron liner is an optimized replica of the original Metrakit racing cylinder. The timing has been revised compared to the original and provided with more advance, making the well-known piston sticking problem due to high heat development a thing of the past. In addition, the cylinder height has been precisely adapted so that the extra-thick base gasket previously required is now superfluous.
This GPO racing cylinder is one of the strongest and most powerful in its class and has been extensively tested. It impresses with ample torque across the entire power band and offers an impressively powerful performance. Thanks to the optimizations compared to the original, the cylinder also achieves a noticeably higher engine speed, which ensures even more power and driving pleasure.
To get the full power out of this tuning cylinder, we recommend at least a 15 mm carburetor. However, you can achieve significantly more power with a 17 mm carburetor. Thanks to the generous 19 mm intake, you have sufficient scope for optimum power delivery.
Manufacturer: GPO · Nominal diameter: 45 mm · Material: Aluminum · Ø outside piston (A): 44.93 mm · Ø piston pin (B): 12 mm · Compression height (C): 23.25 mm · Curvature (D): 2.85 mm · Total piston height (E): 49.6 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring, L-ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.55 mm, 2 mm · Thick piston ring: 1.8 mm, 1.9 mm · Weight piston kit: 98 g
Manufacturer: GPO · Material: Sealing carton, Aluminum, Graphite / Graphite · Number of components: 4 pcs · Thickness: 0.4 mm, 0.5 mm, 2.6 mm · Ø cylinder: 43.5 mm, 45 mm · Hole spacing inlet: 38 mm · Ø outlet inside: 26.5 mm · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 X 44
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Diameter: 5.95 mm · Thread type: M6x1 (standard thread) · Total length: 30 mm · Thread length: 12 mm · Strength class: 10.9
| Manufacturer | GPO |
| Material | Aluminum, Gray cast iron |
| Camouflaged | No |
| Area of application | Tuning, Racing |
| Displacement | 70 ccm |
| Crankshaft stroke | 43 mm |
| Surface | varnished |
| Ø piston pin (B) | 12 mm |
| Nominal diameter | 45 mm |
| Ø cylinder neck | 47.8 mm |
| Ø outlet inside | 26 mm |
| Ø Inlet inside | 19 mm |
| Thread inlet | M6x1 (standard thread) |
| Number of fixing points | 4 pcs |
| Hole pattern [mm] | 44 x 44 |
| Outlet type | straight |
| Hole spacing outlet | 42 mm |
| Thread outlet | M6x1 (standard thread) |
| Hole spacing inlet | 38 mm |
| Puch | E50 ZA50 (air-cooled) Z50 (X30 Sport) |
Ratings
Accessories & related products
swiing® ingenious 15 mm carburetor set camouflaged | Puch E50
Manufacturer: swiing® ingenious parts · Area of application: Tuning · Camouflaged: Yes · Component group Carburetor: Carburetor complete · Choke control: Hand choke · Carburetor type: SRE · Nominal diameter: 15 mm · Ø Internal connection: 20 mm · Ø Inside entrance: 15 mm · Ø Output inside: 15 mm · Ø Air filter connection: 20 mm · Ø fuel hose connection: 5 mm · Ø fuel hose connection: 6 mm · Nozzle thread: M3.5x0.6 (standard thread) · Mounting type: Plug connection clamped · Mounting type: Stud bolts & nuts · Nozzle size: 62 · Hole spacing inlet: 38 mm · Clamping screw torque (max.): 4 N/m
EUR 129.10
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 · Ø piston pin (B): 12 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 Connecting rod eye: 15 mm · Weight: 968 g · Ø Bearing seat (clutch side): 17 mm · Ø Bearing seat (ignition side): 17 mm · Thread type: MF10x1 (fine pitch thread) · Thread length: 11 mm · Dimension needle bearing: 12 / 15 x 14.2 mm (axe 12) · Thread length: 15 mm · 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 · Number of gears: 1 pcs · Area of application: High End · Area of application: Racing · Area of application: Tuning
EUR 221.40
Not in stock
swiing® ingenious resonance exhaust set Ø 28 / 70 mm | Puch Maxi, X30 Sport
Ø outside: 70 mm · Manufacturer: swiing® ingenious parts · Color: Chrome · Material: Steel · Surface: chrome-plated · Total length: 730 mm · Ø Internal connection: 28 mm · Exhaust type: Cigar · Flame tube attachment: Flange · Mounting type: Screwed clamp
EUR 147.60
Hot
swiing® ingenious intake manifold 17 mm SRF camouflaged | Puch E50
Ø inside: 17 mm · Manufacturer: swiing® ingenious parts · Material: Aluminum · Camouflaged: Yes · Mounting type: Stud bolts & nuts · Hole spacing inlet: 38 mm · Total length: 38 mm · Ø External connection: 23 mm · Number of fixing points: 2 pcs · Total height: 53.5 mm · Height flange center hole: 42 mm · Area of application: Performance · Area of application: Racing · Area of application: Tuning
EUR 55.30
HOMOET Exhaust RS Cigar 28 mm black | Puch Maxi / E50
Total length: 920 mm · Manufacturer: HOMOET · Material: Steel · Color: black · Surface: powder-coated · Mounting type: Welded lug · Ø Internal connection: 24.5 mm · Number of fixing points: 3 pcs · Ø Flame tube outside: 28 mm · Exhaust type: Cigar · Flame tube attachment: Nuts & bolts
EUR 190.60
swiing® ingenious 17 mm carburetor set camouflaged | Puch E50
Manufacturer: swiing® ingenious parts · Area of application: Racing · Area of application: Tuning · Camouflaged: Yes · Component group Carburetor: Carburetor complete · Choke control: Hand choke · Carburetor type: SRF · Nominal diameter: 17 mm · Ø Air filter connection: 27.5 mm · Mixed oil connection: No · Nozzle thread: M3.5x0.6 (standard thread) · Mounting type: Plug connection clamped · Nozzle block: 2.2 · Nozzle size: 74 · Hole spacing inlet: 38 mm · Clamping screw torque (max.): 4 N/m
EUR 221.40
swiing® ingenious resonance exhaust set Ø 28 / 70 mm camouflaged | Puch Maxi
Manufacturer: swiing® ingenious parts · Material: Steel · Surface: chrome-plated · Ø outside: 70 mm · Total length: 730 mm · Color: Chrome · Ø Silencer: 70 mm · Ø Internal connection: 28 mm · Ø Flame tube outside: 28 mm · Exhaust type: Cigar · Mounting type: Screwed clamp · Flame tube attachment: Flange
EUR 190.60
GPO piston rings 45 mm (Metrakit replica) | Puch
Nominal diameter: 45 mm · Manufacturer: GPO · Diameter: 45 mm · Height: 1.5 mm · Piston ring mold: L-ring · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring impact: Internal fuse (IS) · Thick piston ring: 1.7 mm
EUR 15.90
GPO Ø 43.5 mm cylinder kit (Metrakit replica) | Puch
Manufacturer: GPO · Camouflaged: No · Area of application: Racing · Area of application: Tuning · Material: Aluminum · Material: Gray cast iron · Surface: varnished · Crankshaft stroke: 43 mm · Displacement: 64 ccm · Ø piston pin (B): 12 mm · Nominal diameter: 43.5 mm · Ø cylinder neck: 47.8 mm · Ø outlet inside: 26 mm · Ø Inlet inside: 19 mm · Thread inlet: M6x1 (standard thread) · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Outlet type: straight · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Hole spacing inlet: 38 mm
EUR 178.30
GPO 21 mm intake manifold Dell'Orto PHBG | Puch E50 / Z50 / ZA50 (wind cooled) / ZA50 (Cat.)
Ø inside: 21 mm · Manufacturer: GPO · Material: Aluminum · Mounting type: Stud bolts & nuts · Hole spacing inlet: 38 mm · Total length: 85.5 mm · Ø External connection: 26 mm · Number of fixing points: 2 pcs · Total height: 68.6 mm · Area of application: Racing · Area of application: Tuning
EUR 42.40
Explore categories from Cylinder
Moped fans also bought
GPO 45 mm cylinder head tuning black | Puch Maxi S, N, X30 NS, NL, N-2AH
Total length: 135 mm · Manufacturer: GPO · Material: Aluminum · Camouflaged: Yes · Surface: varnished · Height: 55 mm · Number of fixing points: 4 pcs · Ø cylinder: 45 mm · Width: 125 mm · Decompressor: No · Area of application: Tuning
EUR 52.80
Not in stock
Hot
swiing® ingenious 17 mm SRF carburetor camouflaged | Puch Maxi, Supermaxi, X30 NS / NL
Total length: 65 mm · Nominal diameter: 17 mm · Manufacturer: swiing® ingenious parts · Material: Aluminum · Camouflaged: Yes · Component group Carburetor: Carburetor complete · Mounting type: Plug connection clamped · Carburetor type: SRE · Ø Internal connection: 23 mm · Height: 89 mm · Height: 109 mm · Ø Inside entrance: 17 mm · Width: 47 mm · Ø Output inside: 17.1 mm · Ø Air filter connection: 27.5 mm · Ø fuel hose connection: 5 mm · Mixed oil connection: No · Vacuum connection: No · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.2 · Nozzle size: 74 · Clamping screw torque (max.): 3 N/m · Clamping screw torque (max.): 4 N/m · Area of application: Tuning
EUR 147.60
Hot
swiing® ingenious intake manifold 17 mm SRF camouflaged | Puch E50
Ø inside: 17 mm · Manufacturer: swiing® ingenious parts · Material: Aluminum · Camouflaged: Yes · Mounting type: Stud bolts & nuts · Hole spacing inlet: 38 mm · Total length: 38 mm · Ø External connection: 23 mm · Number of fixing points: 2 pcs · Total height: 53.5 mm · Height flange center hole: 42 mm · Area of application: Performance · Area of application: Racing · Area of application: Tuning
EUR 55.30
GPO 45 mm piston (Metrakit replica) | Puch
Manufacturer: GPO · Material: Aluminum · Ø outside piston (A): 44.93 mm · Ø piston pin (B): 12 mm · Compression height (C): 23.25 mm · Curvature (D): 2.85 mm · Total piston height (E): 49.6 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 45 mm · Piston ring mold: L-ring · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.55 mm · Piston ring height: 2 mm · Thick piston ring: 1.8 mm · Thick piston ring: 1.9 mm · Weight piston kit: 98 g
EUR 61.40
GPO gasket set 43.5 & 45 mm (Metrakit replica) | Puch
Manufacturer: GPO · Thickness: 0.4 mm · Thickness: 0.5 mm · Thickness: 2.6 mm · Material: Aluminum · Material: Graphite / Graphite · Material: Sealing carton · Number of components: 4 pcs · Ø outlet inside: 26.5 mm · Ø cylinder: 43.5 mm · Ø cylinder: 45 mm · Hole pattern [mm]: 44 X 44 · Hole spacing outlet: 42 mm · Hole spacing inlet: 38 mm
EUR 18.30
AKOA 45 mm cylinder head black | Puch E50 / ZA50 (wind cooled) / ZA50 (cat.) / Z50
Total length: 132.2 mm · Manufacturer: AKOA · Material: Aluminum · Camouflaged: No · Surface: varnished · Height: 54.5 mm · Number of fixing points: 4 pcs · Ø cylinder: 45 mm · Width: 123.2 mm · Hole pattern [mm]: 44 x 44 · Decompressor: No · Area of application: Tuning
EUR 55.30
Not in stock
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
