Bladed 41 mm (55 cc) cylinder kit with 12 mm piston pin, suitable for your Puch X30 Velux and X30 NG-2AH moped / moped and with adaptations to your DS, MV, MS, VZ (EX50) small motorcycle
The cylinder's timing has been kept rather low, which is characterized by a very nice torque in the lower speed range.
Details:
Cast iron reproduction cylinder with Ø 41.0 mm bore
Slot-controlled
Ø 19 mm intake, 32 mm stud spacing
Optimized overflow channels
Improved timing
No spindling of the engine housing necessary (Ø cylinder neck 45.0 mm)
Ø 25 mm outlet, 42 mm stud bolt distance
Hole pattern stud bolt: 44 x 44 mm
Incl. Ø 41 mm piston from the Italian manufacturer -GOL-
Notes:
For Puch Velux engines, the slot on the housing no longer needs to be cast on thanks to the large sealing surface.
For ZA50-G engines, the housing may need to be spindled on.
The cylinder kit can also be used on DS, MV, MS, VZ (EX50) engines, provided the housing is spindled on. Please observe the installation direction when assembling. The piston is inserted with the arrow pointing towards the outlet on the exhaust side.
| Nominal diameter | 41 mm |
| Manufacturer | BAD ASS |
| Material | Gray cast iron |
| Camouflaged | No |
| Area of application | Tuning |
| Surface | sandblasted |
| Ø piston pin (B) | 12 mm |
| Ø cylinder neck | 44.9 mm |
| Ø outlet inside | 25 mm |
| Ø Inlet inside | 19 mm |
| Hole spacing inlet | 32 mm |
| Hole pattern [mm] | 44 x 44 |
| Thread inlet | M6x1 (standard thread) |
| Number of fixing points | 4 pcs |
| Decompressor | No |
| Outlet type | straight |
| Hole spacing outlet | 42 mm |
| Thread outlet | M6x1 (standard thread) |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
Ratings
Accessories & related products
swiing® ingenious 15 mm carburetor set camouflaged | Puch X30 Velux
Manufacturer: swiing® ingenious parts · Component group Carburetor: Carburetor complete · 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 Air filter connection: 23 mm · Ø fuel hose connection: 6 mm · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 62 · Mounting type: Flange · Mounting type: Plug connection clamped · Hole spacing inlet: 32 mm · Area of application: Tuning
EUR 145.80
swiing® ingenious resonance exhaust set Ø 28 / 70 mm | Puch X30 Velux
Manufacturer: swiing® ingenious parts · Material: Steel · Surface: chrome-plated · Ø outside: 70 mm · Total length: 730 mm · Color: Chrome · Ø Internal connection: 28 mm · Exhaust type: Cigar · Mounting type: Screwed clamp · Flame tube attachment: Flange
EUR 169.60
swiing® revival stud bolt set M6x30 (10.9 strength) galvanized
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Diameter: 6 mm · Thread type: M6x1 (standard thread) · Total length: 30 mm · Thread length: 12 mm · Width across flats: 10 mm · Strength class: 8 · Strength class: 10.9 · Drive: External hexagon
EUR 12.70
GOL piston 41 mm BAD ASS Lucifer | Puch X30 Velux, NG-2AH
Manufacturer: BAD ASS · Nominal diameter: 41 mm · Ø outside piston (A): 40.94 mm · Ø piston pin (B): 12 mm · Compression height (C): 22.4 mm · Curvature (D): 2.4 mm · Total piston height (E): 48.3 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Weight piston kit: 86 g
EUR 82.90
GPO cylinder gasket set BAD ASS Lucifer / GPO Sombrero 41 mm | Puch X30 Velux, M50, MS
Manufacturer: GPO · Material: Aluminum · Material: Sealing paper · Number of components: 4 pcs · Thickness: 0.4 mm · Thickness: 0.45 mm · Ø cylinder: 41 mm · Hole spacing inlet: 32 mm · Ø outlet inside: 27 mm · Hole spacing outlet: 32 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Tuning
EUR 23.60
GPO Ø 41 mm "Sombrero" cylinder kit | Puch X30 Velux, NG-2AH
Nominal diameter: 41 mm · Manufacturer: GPO · Material: Gray cast iron · Displacement: 57 ccm · Crankshaft stroke: 43 mm · Ø cylinder neck: 44.7 mm · Ø outlet inside: 25 mm · Ø Inlet inside: 19 mm · Thread inlet: M6x1 (standard thread) · Hole spacing inlet: 32 mm · Ø piston pin (B): 10 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 · Decompressor: No · Camouflaged: No · Area of application: Tuning
EUR 237.20
Explore categories from Cylinder
Moped fans also bought
Hot 
swiing® ingenious 15 mm carburetor camouflaged | Sachs 503
Manufacturer: swiing® ingenious parts · Camouflaged: Yes · Component group Carburetor: Carburetor complete · Material: Aluminum · 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: 6 mm · Mixed oil connection: No · Vacuum connection: No · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.17 · Nozzle size: 62 · Mounting type: Plug connection clamped · Clamping screw torque (max.): 4 N/m · Total length: 66 mm · Width: 50 mm · Height: 95 mm · Area of application: Tuning
EUR 94.80
swiing® ingenious 15 mm carburetor set camouflaged | Puch X30 Velux
Manufacturer: swiing® ingenious parts · Component group Carburetor: Carburetor complete · 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 Air filter connection: 23 mm · Ø fuel hose connection: 6 mm · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 62 · Mounting type: Flange · Mounting type: Plug connection clamped · Hole spacing inlet: 32 mm · Area of application: Tuning
EUR 145.80
GPO cylinder gasket set BAD ASS Lucifer / GPO Sombrero 41 mm | Puch X30 Velux, M50, MS
Manufacturer: GPO · Material: Aluminum · Material: Sealing paper · Number of components: 4 pcs · Thickness: 0.4 mm · Thickness: 0.45 mm · Ø cylinder: 41 mm · Hole spacing inlet: 32 mm · Ø outlet inside: 27 mm · Hole spacing outlet: 32 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Tuning
EUR 23.60
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
