- 10 %
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
| Nominal diameter | 45 mm |
| Manufacturer | GPO |
| Material | Aluminum, Gray cast iron |
| Camouflaged | No |
| Area of application | Tuning, Racing |
| Surface | varnished |
| Displacement | 70 ccm |
| Crankshaft stroke | 43 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) |
| Hole pattern [mm] | 44 x 44 |
| Number of fixing points | 4 pcs |
| Ø piston pin (B) | 12 mm |
| 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
Nominal diameter: 15 mm · Manufacturer: swiing® ingenious parts · Area of application: Tuning · Camouflaged: Yes · Component group Carburetor: Carburetor complete · Carburetor type: SRE · Choke control: Hand choke · Hole spacing inlet: 38 mm · Ø Inside entrance: 15 mm · Mounting type: Plug connection clamped · Mounting type: Stud bolts & nuts · Ø Output inside: 15 mm · Ø Air filter connection: 20 mm · Ø Internal connection: 20 mm · Ø fuel hose connection: 5 mm · Ø fuel hose connection: 6 mm · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 62 · 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 · Area of application: High End · Area of application: Racing · Material: Steel · Area of application: Tuning · Cheek type: Full cheeks · Weight: 968 g · Crankshaft stroke: 43 mm · Connecting rod length center-center: 90 mm · Number of gears: 1 pcs · Total length of crankpin on clutch side: 74 mm · Total length crankpin ignition side: 66 mm · Ø crank webs: 69.9 mm · Thread length: 11 mm · Thread length: 15 mm · Ø Connecting rod eye: 15 mm · Ø piston pin (B): 12 mm · Ø Bearing seat (clutch side): 17 mm · Thread type: MF10x1 (fine pitch thread) · 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
EUR 221.40
swiing® ingenious resonance exhaust set Ø 28 / 70 mm | Puch Maxi, X30 Sport
Manufacturer: swiing® ingenious parts · Material: Steel · Color: Chrome · Surface: chrome-plated · Total length: 730 mm · Mounting type: Screwed clamp · Ø outside: 70 mm · Exhaust type: Cigar · Ø Internal connection: 28 mm · Flame tube attachment: Flange
EUR 147.60
Hot
swiing® ingenious intake manifold 17 mm SRF camouflaged | Puch E50
Ø inside: 17 mm · Manufacturer: swiing® ingenious parts · Material: Aluminum · Hole spacing inlet: 38 mm · Total length: 38 mm · Camouflaged: Yes · Ø External connection: 23 mm · Area of application: Performance · Area of application: Racing · Area of application: Tuning · Height flange center hole: 42 mm · Total height: 53.5 mm · Number of fixing points: 2 pcs · Mounting type: Stud bolts & nuts
EUR 55.30
HOMOET Exhaust RS Cigar 28 mm black | Puch Maxi / E50
Total length: 920 mm · Manufacturer: HOMOET · Material: Steel · Surface: powder-coated · Color: black · Ø Internal connection: 24.5 mm · Ø Flame tube outside: 28 mm · Exhaust type: Cigar · Flame tube attachment: Nuts & bolts · Number of fixing points: 3 pcs · Mounting type: Welded lug
EUR 190.60
swiing® ingenious 17 mm carburetor set camouflaged | Puch E50
Manufacturer: swiing® ingenious parts · Component group Carburetor: Carburetor complete · Carburetor type: SRF · Nominal diameter: 17 mm · Choke control: Hand choke · Hole spacing inlet: 38 mm · Camouflaged: Yes · Ø Air filter connection: 27.5 mm · Area of application: Racing · Area of application: Tuning · Mixed oil connection: No · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.2 · Nozzle size: 74 · Mounting type: Plug connection clamped · Clamping screw torque (max.): 4 N/m
EUR 221.40
swiing® ingenious resonance exhaust set Ø 28 / 70 mm camouflaged | Puch Maxi
Total length: 730 mm · Manufacturer: swiing® ingenious parts · Material: Steel · Color: Chrome · Surface: chrome-plated · Ø Silencer: 70 mm · Ø outside: 70 mm · Mounting type: Screwed clamp · Ø Flame tube outside: 28 mm · Exhaust type: Cigar · Ø Internal connection: 28 mm · Flame tube attachment: Flange
EUR 190.60
GPO piston rings 45 mm (Metrakit replica) | Puch
Manufacturer: GPO · Nominal diameter: 45 mm · Height: 1.5 mm · Piston ring mold: L-ring · Piston ring mold: Rectangular ring · Diameter: 45 mm · 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
Nominal diameter: 43.5 mm · Manufacturer: GPO · Material: Aluminum · Material: Gray cast iron · Camouflaged: No · Area of application: Racing · Area of application: Tuning · 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 · Hole spacing inlet: 38 mm · Thread inlet: M6x1 (standard thread) · Hole pattern [mm]: 44 x 44 · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Outlet type: straight · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread)
EUR 178.30
EUR 159.90
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 · Surface: varnished · Ø cylinder: 45 mm · Width: 125 mm · Height: 55 mm · Camouflaged: Yes · Decompressor: No · Area of application: Tuning · Number of fixing points: 4 pcs
EUR 52.80
Not in stock
Hot
swiing® ingenious 17 mm SRF carburetor camouflaged | Puch Maxi, Supermaxi, X30 NS / NL
Total length: 65 mm · Manufacturer: swiing® ingenious parts · Material: Aluminum · Component group Carburetor: Carburetor complete · Carburetor type: SRE · Nominal diameter: 17 mm · Choke control: Hand choke · Width: 47 mm · Height: 89 mm · Height: 109 mm · Camouflaged: Yes · Ø Internal connection: 23 mm · Ø Inside entrance: 17 mm · Ø Output inside: 17.1 mm · Ø Air filter connection: 27.5 mm · Area of application: Tuning · Ø fuel hose connection: 5 mm · Mixed oil connection: No · Vacuum connection: No · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.2 · Nozzle size: 74 · Mounting type: Plug connection clamped · Clamping screw torque (max.): 3 N/m · Clamping screw torque (max.): 4 N/m
EUR 147.60
Hot
swiing® ingenious intake manifold 17 mm SRF camouflaged | Puch E50
Ø inside: 17 mm · Manufacturer: swiing® ingenious parts · Material: Aluminum · Hole spacing inlet: 38 mm · Total length: 38 mm · Camouflaged: Yes · Ø External connection: 23 mm · Area of application: Performance · Area of application: Racing · Area of application: Tuning · Height flange center hole: 42 mm · Total height: 53.5 mm · Number of fixing points: 2 pcs · Mounting type: Stud bolts & nuts
EUR 55.30
GPO 45 mm piston (Metrakit replica) | Puch
Manufacturer: GPO · Material: Aluminum · Ø outside piston (A): 44.93 mm · Compression height (C): 23.25 mm · Curvature (D): 2.85 mm · Nominal diameter: 45 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) · Piston ring height: 1.55 mm · Piston ring height: 2 mm · Thick piston ring: 1.8 mm · Thick piston ring: 1.9 mm · Ø piston pin (B): 12 mm · Weight piston kit: 98 g
EUR 61.40
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 · Hole pattern [mm]: 44 X 44 · Number of components: 4 pcs · Hole spacing outlet: 42 mm
EUR 18.30
AKOA 45 mm cylinder head black | Puch E50 / ZA50 (wind cooled) / ZA50 (cat.) / Z50
Manufacturer: AKOA · Material: Aluminum · Camouflaged: No · Area of application: Tuning · Surface: varnished · Ø cylinder: 45 mm · Total length: 132.2 mm · Width: 123.2 mm · Height: 54.5 mm · Hole pattern [mm]: 44 x 44 · Number of fixing points: 4 pcs · Decompressor: No
EUR 55.30
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
