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 |
| Camouflaged | No |
| Area of application | Tuning, Racing |
| Material | Aluminum, Gray cast iron |
| Displacement | 70 ccm |
| Surface | varnished |
| Crankshaft stroke | 43 mm |
| 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 |
| Hole spacing inlet | 38 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) |
| 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 fuel hose connection: 5 mm · Ø fuel hose connection: 6 mm · Hole spacing inlet: 38 mm · Ø Inside entrance: 15 mm · Ø Internal connection: 20 mm · Ø Output inside: 15 mm · Ø Air filter connection: 20 mm · Mounting type: Plug connection clamped · Mounting type: Stud bolts & nuts · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 62 · Clamping screw torque (max.): 4 N/m
CHF 104.90
Hot
swiing® ingenious crankshaft "High End" with mounted bearings | Puch E50
Manufacturer: swiing® ingenious parts · Area of application: High End · Area of application: Racing · Area of application: Tuning · Material: Aluminum · Cheek type: Full cheeks · Material: Steel · Crankshaft stroke: 43 mm · Ø piston pin (B): 12 mm · Thread type: MF10x1 (fine pitch thread) · Connecting rod length center-center: 90 mm · Thread length: 11 mm · Thread length: 15 mm · Total length of crankpin on clutch side: 74 mm · Weight: 968 g · Total length crankpin ignition side: 66 mm · Ø crank webs: 69.9 mm · Ø Connecting rod eye: 15 mm · Ø Bearing seat (clutch side): 17 mm · Ø Bearing seat (ignition side): 17 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 · Number of gears: 1 pcs
CHF 179.90
swiing® ingenious resonance exhaust set Ø 28 / 70 mm | Puch Maxi, X30 Sport
Manufacturer: swiing® ingenious parts · Color: Chrome · Material: Steel · Surface: chrome-plated · Total length: 730 mm · Ø Internal connection: 28 mm · Ø outside: 70 mm · Exhaust type: Cigar · Mounting type: Screwed clamp · Flame tube attachment: Flange
CHF 119.90
Hot
swiing® ingenious intake manifold 17 mm SRF camouflaged | Puch E50
Manufacturer: swiing® ingenious parts · Area of application: Performance · Area of application: Racing · Area of application: Tuning · Camouflaged: Yes · Material: Aluminum · Ø inside: 17 mm · Ø External connection: 23 mm · Hole spacing inlet: 38 mm · Mounting type: Stud bolts & nuts · Number of fixing points: 2 pcs · Total height: 53.5 mm · Height flange center hole: 42 mm · Total length: 38 mm
CHF 44.90
HOMOET Exhaust RS Cigar 28 mm black | Puch Maxi / E50
Manufacturer: HOMOET · Material: Steel · Color: black · Surface: powder-coated · Total length: 920 mm · Ø Internal connection: 24.5 mm · Mounting type: Welded lug · Number of fixing points: 3 pcs · Ø Flame tube outside: 28 mm · Exhaust type: Cigar · Flame tube attachment: Nuts & bolts
CHF 154.90
Not in stock
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 · Hole spacing inlet: 38 mm · Ø Air filter connection: 27.5 mm · Mounting type: Plug connection clamped · Mixed oil connection: No · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.2 · Nozzle size: 74 · Clamping screw torque (max.): 4 N/m
CHF 179.90
CHF 159.90
swiing® ingenious resonance exhaust set Ø 28 / 70 mm camouflaged | Puch Maxi
Manufacturer: swiing® ingenious parts · Material: Steel · Surface: chrome-plated · Color: Chrome · Total length: 730 mm · Ø Silencer: 70 mm · Ø Internal connection: 28 mm · Mounting type: Screwed clamp · Ø outside: 70 mm · Ø Flame tube outside: 28 mm · Exhaust type: Cigar · Flame tube attachment: Flange
CHF 154.90
GPO 43.5 mm cylinder kit (Metrakit replica) | Puch
Nominal diameter: 43.5 mm · Manufacturer: GPO · Material: Aluminum · Material: Gray cast iron · Surface: varnished · Displacement: 64 ccm · Crankshaft stroke: 43 mm · Ø cylinder neck: 47.8 mm · Ø outlet inside: 26 mm · Ø Inlet inside: 19 mm · Thread inlet: M6x1 (standard thread) · Hole spacing inlet: 38 mm · Ø piston pin (B): 12 mm · Outlet type: straight · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Camouflaged: No · Area of application: Racing · Area of application: Tuning
CHF 144.90
GPO 21 mm intake manifold Dell'Orto PHBG | Puch E50 / Z50 / ZA50 (wind cooled) / ZA50 (Cat.)
Manufacturer: GPO · Mounting type: Stud bolts & nuts · Material: Aluminum · Ø External connection: 26 mm · Hole spacing inlet: 38 mm · Ø inside: 21 mm · Total height: 68.6 mm · Total length: 85.5 mm · Number of fixing points: 2 pcs · Area of application: Racing · Area of application: Tuning
CHF 34.50
Explore categories from Cylinder
Moped fans also bought
GPO 45 mm cylinder head tuning black | Puch Maxi S, N, X30 NS, NL, N-2AH
Manufacturer: GPO · Material: Aluminum · Surface: varnished · Ø cylinder: 45 mm · Total length: 135 mm · Width: 125 mm · Height: 55 mm · Number of fixing points: 4 pcs · Decompressor: No · Camouflaged: Yes · Area of application: Tuning
CHF 42.90
Not in stock
Hot
swiing® ingenious 17 mm SRF carburetor camouflaged | Puch Maxi, Supermaxi, X30 NS / NL
Manufacturer: swiing® ingenious parts · Area of application: Tuning · Camouflaged: Yes · Component group Carburetor: Carburetor complete · Material: Aluminum · Width: 47 mm · Choke control: Hand choke · Carburetor type: SRE · Height: 89 mm · Height: 109 mm · Nominal diameter: 17 mm · Total length: 65 mm · Ø fuel hose connection: 5 mm · Ø Inside entrance: 17 mm · Ø Internal connection: 23 mm · Ø Output inside: 17.1 mm · Ø Air filter connection: 27.5 mm · Mounting type: Plug connection clamped · Mixed oil connection: No · Vacuum connection: No · 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
CHF 119.90
Hot
swiing® ingenious intake manifold 17 mm SRF camouflaged | Puch E50
Manufacturer: swiing® ingenious parts · Area of application: Performance · Area of application: Racing · Area of application: Tuning · Camouflaged: Yes · Material: Aluminum · Ø inside: 17 mm · Ø External connection: 23 mm · Hole spacing inlet: 38 mm · Mounting type: Stud bolts & nuts · Number of fixing points: 2 pcs · Total height: 53.5 mm · Height flange center hole: 42 mm · Total length: 38 mm
CHF 44.90
GPO 45 mm piston (Metrakit replica) | Puch
Manufacturer: GPO · Material: Aluminum · Thick piston ring: 1.8 mm · Thick piston ring: 1.9 mm · 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: L-ring · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Nominal diameter: 45 mm · Piston ring height: 1.55 mm · Piston ring height: 2 mm · Weight piston kit: 98 g
CHF 49.90
GPO gasket set 43.5 & 45 mm (Metrakit replica) | Puch
Manufacturer: GPO · Material: Aluminum · Material: Graphite / Graphite · Material: Sealing carton · Ø cylinder: 43.5 mm · Ø cylinder: 45 mm · Ø outlet inside: 26.5 mm · Hole spacing inlet: 38 mm · Thickness: 0.4 mm · Thickness: 0.5 mm · Thickness: 2.6 mm · Number of components: 4 pcs · Hole pattern [mm]: 44 X 44 · Hole spacing outlet: 42 mm
CHF 14.90
AKOA 45 mm cylinder head black | Puch E50 / ZA50 (wind cooled) / ZA50 (cat.) / Z50
Width: 123.2 mm · Manufacturer: AKOA · Material: Aluminum · Area of application: Tuning · Surface: varnished · Ø cylinder: 45 mm · Total length: 132.2 mm · Height: 54.5 mm · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Decompressor: No · Camouflaged: No
CHF 44.90
Not in stock
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
