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.
| Manufacturer | BAD ASS |
| Camouflaged | No |
| Material | Gray cast iron |
| Surface | sandblasted |
| Nominal diameter | 41 mm |
| Ø cylinder neck | 44.9 mm |
| Number of fixing points | 4 pcs |
| Ø outlet inside | 25 mm |
| Ø Inlet inside | 19 mm |
| Hole pattern [mm] | 44 x 44 |
| Thread inlet | M6x1 (standard thread) |
| Ø piston pin (B) | 12 mm |
| Outlet type | straight |
| Hole spacing outlet | 42 mm |
| Thread outlet | M6x1 (standard thread) |
| Decompressor | No |
| Hole spacing inlet | 32 mm |
| Area of application | Tuning |
| Puch | ZA50 (fan-cooled) Z50 (X30 Velux) 2-speed MS, MV, MV50 3-speed VSD, DS, VZ, MC |
Accessories & related products
swiing® ingenious 15 mm carburetor set camouflaged | Puch X30 Velux
Nominal diameter: 15 mm · Manufacturer: swiing® ingenious parts · Component group Carburetor: Carburetor complete · Carburetor type: SRE · Ø Inside entrance: 15 mm · Ø Internal connection: 20 mm · Ø Output inside: 15 mm · Ø Air filter connection: 20 mm · Ø Air filter connection: 23 mm · Hole spacing inlet: 32 mm · Ø fuel hose connection: 6 mm · Mounting type: Flange · Mounting type: Plug connection clamped · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 62 · Area of application: Tuning
CHF 122.90
swiing® ingenious resonance exhaust set Ø 28 / 70 mm | Puch X30 Velux
Manufacturer: swiing® ingenious parts · Material: Steel · Color: Chrome · Ø outside: 70 mm · Total length: 730 mm · Surface: chrome-plated · Ø Internal connection: 28 mm · Exhaust type: Cigar · Mounting type: Screwed clamp · Flame tube attachment: Flange
CHF 142.90
swiing® revival stud bolt set M6x30 (10.9 strength) galvanized
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Thread type: M6x1 (standard thread) · Diameter: 6 mm · Nominal diameter (thread): 6 mm · Drive: External hexagon · Total length: 30 mm · Thread length: 12 mm · Width across flats: 10 mm · Strength class: 8 · Strength class: 10.9
CHF 10.70
GOL piston 41 mm BAD ASS Lucifer | Puch X30 Velux, NG-2AH
Nominal diameter: 41 mm · Manufacturer: BAD ASS · Ø outside piston (A): 40.94 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) · Ø piston pin (B): 12 mm · Weight piston kit: 86 g
CHF 69.90
GPO cylinder gasket set BAD ASS Lucifer / GPO Sombrero 41 mm | Puch X30 Velux, M50, MS
Thickness: 0.4 mm · Thickness: 0.45 mm · Number of components: 4 pcs · Manufacturer: GPO · Material: Aluminum · Material: Sealing paper · Ø cylinder: 41 mm · Ø outlet inside: 27 mm · Hole pattern [mm]: 44 x 44 mm · Hole spacing outlet: 32 mm · Decompressor: Yes · Area of application: Tuning · Hole spacing inlet: 32 mm
CHF 19.90
GPO 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
CHF 199.90
Explore categories from Cylinder
Moped fans also bought
Hot 
swiing® ingenious 15 mm carburetor camouflaged | Sachs 503
Nominal diameter: 15 mm · Manufacturer: swiing® ingenious parts · Component group Carburetor: Carburetor complete · Material: Aluminum · Carburetor type: SRE · Total length: 66 mm · Width: 50 mm · Ø Inside entrance: 15 mm · Ø Internal connection: 20 mm · Ø Output inside: 15 mm · Height: 95 mm · Ø Air filter connection: 20 mm · Ø fuel hose connection: 6 mm · Mixed oil connection: No · Mounting type: Plug connection clamped · Vacuum connection: No · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.17 · Camouflaged: Yes · Nozzle size: 62 · Area of application: Tuning · Clamping screw torque (max.): 4 N/m
CHF 79.90
swiing® ingenious 15 mm carburetor set camouflaged | Puch X30 Velux
Nominal diameter: 15 mm · Manufacturer: swiing® ingenious parts · Component group Carburetor: Carburetor complete · Carburetor type: SRE · Ø Inside entrance: 15 mm · Ø Internal connection: 20 mm · Ø Output inside: 15 mm · Ø Air filter connection: 20 mm · Ø Air filter connection: 23 mm · Hole spacing inlet: 32 mm · Ø fuel hose connection: 6 mm · Mounting type: Flange · Mounting type: Plug connection clamped · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle size: 62 · Area of application: Tuning
CHF 122.90
GPO cylinder gasket set BAD ASS Lucifer / GPO Sombrero 41 mm | Puch X30 Velux, M50, MS
Thickness: 0.4 mm · Thickness: 0.45 mm · Number of components: 4 pcs · Manufacturer: GPO · Material: Aluminum · Material: Sealing paper · Ø cylinder: 41 mm · Ø outlet inside: 27 mm · Hole pattern [mm]: 44 x 44 mm · Hole spacing outlet: 32 mm · Decompressor: Yes · Area of application: Tuning · Hole spacing inlet: 32 mm
CHF 19.90
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
