Tuning kit with a 70 cc displacement, compatible with all Puch Maxi S and N mopeds equipped with an E50 engine.
This racing kit, featuring an improved replica of the legendary Metrakit racing cylinder, is ideal for enthusiasts who value quality, durability, and, above all, performance. The individual components are finely tuned to work together and guarantee optimal power delivery.
Unlike the original, the aluminum cylinder with a gray cast iron liner has been extensively redesigned to enable a seamless plug-and-play tuning experience. This GPO racing cylinder is among the strongest and most powerful in its class and delivers impressive torque across the entire power band.
When you purchase this complete set, you’ll receive a substantial discount on the retail price of the individual parts.
Note: If you own a Puch Maxi N, you should select an optionally available exhaust clamp, as it is not included as standard with the cigar-shaped muffler. Please pay attention to the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
You can find additional tuning kits in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
Camouflaged: No · Manufacturer: GPO · Material: Aluminum, Gray cast iron · Surface: varnished · Displacement: 70 ccm · Crankshaft stroke: 43 mm · Nominal diameter: 45 mm · Ø cylinder neck: 47.8 mm · Hole spacing inlet: 38 mm · Hole spacing outlet: 42 mm · Hole spacing for cylinder mounting: 44 mm · Outlet type: straight · Cooling type: Airstream cooling · Number of fixing points: 4 pcs · Area of application: Tuning, Racing
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 (thread): 6 mm
Manufacturer: AKOA · Material: Aluminum · Surface: varnished · Ø cylinder: 45 mm · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Decompressor: No · Total length: 132.2 mm · Width: 123.2 mm · Height: 54.5 mm · Area of application: Tuning · Camouflaged: No
Nozzle block: 2.2 · Nozzle size: 74 · Manufacturer: swiing® ingenious parts · Camouflaged: Yes · Material: Aluminum · Carburetor type: SRE · Nominal diameter: 17 mm · Ø Internal connection: 23 mm · Ø Inside entrance: 17 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) · Mounting type: Plug connection clamped · Clamping screw torque (max.): 3 N/m, 4 N/m · Total length: 65 mm · Width: 47 mm · Height: 109 mm, 89 mm · Area of application: Tuning · Component group Carburetor: Carburetor complete
Manufacturer: GPO · Camouflaged: Yes · Color: black · Material: Plastic · Filter type: Box · Ø Internal connection: 20 mm, 28 mm · Mounting type: Plug connection clamped · Area of application: Tuning
Manufacturer: GEMI · Material: Chrome steel (colloquially known as stainless steel), Steel · Surface: galvanized (blue) · Ø inside: 20 - 32 mm · Width: 9 mm · Pony OEM number: A3346
Manufacturer: swiing® ingenious parts · Color: red, black · Material: Foam · Ø outside: 50 mm · Area of application: Tuning
Nozzle size: 76, 78, 80, 82, 84, 86 · Manufacturer: swiing® revival parts · Material: Brass · Quantity: 6 pcs · Carburetor type: SRE, SRF, SRA (1/11/31) Velux, SRA (1/11/35) Velux, SRC · Nozzle type: Main nozzle · Nozzle thread: M3.5x0.6 (standard thread) · Total length: 6 mm · Drive: Slot · Component group Carburetor: Spraying
Manufacturer: swiing® ingenious parts · Camouflaged: Yes · Material: Aluminum · Ø inside: 17 mm · Ø External connection: 23 mm · Mounting type: Stud bolts & nuts · Hole spacing inlet: 38 mm · Number of fixing points: 2 pcs · Total height: 53.5 mm · Height flange center hole: 42 mm · Total length: 38 mm · Area of application: Tuning, Racing, Performance
| Puch | E50 |
Accessories & related products
GPO blade gauge set 0.05 - 1.00 mm 20 pcs.
Measuring range: 0.05 - 1 mm · Manufacturer: GPO · Material: Steel · Area of application: Measuring tool · Thickness: 0.05 mm · Thickness: 0.1 mm · Thickness: 0.15 mm · Thickness: 0.2 mm · Thickness: 0.25 mm · Thickness: 0.3 mm · Thickness: 0.35 mm · Thickness: 0.4 mm · Thickness: 0.45 mm · Thickness: 0.5 mm · Thickness: 0.55 mm · Thickness: 0.65 mm · Thickness: 0.7 mm · Thickness: 0.75 mm · Thickness: 0.8 mm · Thickness: 0.85 mm · Thickness: 0.9 mm · Thickness: 0.95 mm · Thickness: 1 mm · Number of components: 20 pcs
EUR 17,50
swiing® ingenious tuning set 38 mm (with choice of exhaust) | Puch E50, ZA50
Manufacturer: GPO · Manufacturer: NGK · Manufacturer: swiing® ingenious parts · Manufacturer: swiing® revival parts · Nominal diameter: 38 mm · Displacement: 50 ccm · Ø piston pin (B): 12 mm · Area of application: Tuning · Outlet type: straight · Camouflaged: Yes
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swiing® ingenious tuning set 44 mm | Puch E50, ZA50
Nominal diameter: 44 mm · Manufacturer: GPO · Manufacturer: NGK · Manufacturer: swiing® ingenious parts · Displacement: 65 ccm · Ø piston pin (B): 12 mm · Outlet type: straight · Decompressor: No · Camouflaged: Yes · Area of application: Tuning
EUR 400,00
GPO Tuning Kit 43.5 mm (Metrakit Replica) | Puch E50
Nominal diameter: 43.5 mm · Manufacturer: GPO · Material: Aluminum · Material: Gray cast iron · Material: Steel · Displacement: 64 ccm · Crankshaft stroke: 43 mm · Ø cylinder neck: 47.8 mm · Ø piston pin (B): 12 mm · Outlet type: straight · Hole pattern [mm]: 44 x 44 · Decompressor: No · Camouflaged: No · Area of application: Racing · Area of application: Tuning
EUR 541,20
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