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.
| Surface | sandblasted |
| Manufacturer | BAD ASS |
| Number of fixing points | 4 pcs |
| Material | Gray cast iron |
| Nominal diameter | 41 mm |
| Ø cylinder neck | 44.9 mm |
| Camouflaged | No |
| Ø Inlet inside | 19 mm |
| Ø outlet inside | 25 mm |
| Thread inlet | M6x1 (standard thread) |
| Ø piston pin (B) | 12 mm |
| Hole spacing outlet | 42 mm |
| Hole pattern [mm] | 44 x 44 |
| Hole spacing inlet | 32 mm |
| Outlet type | straight |
| Thread outlet | M6x1 (standard thread) |
| Decompressor | No |
| Area of application | Tuning |
| 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
144,60 EUR
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
168,10 EUR
swiing® revival stud bolt set M6x30 (10.9 strength) galvanized
Surface: galvanized (blue) · Manufacturer: swiing® revival parts · Material: Steel · Diameter: 6 mm · Drive: External hexagon · Total length: 30 mm · Thread type: M6x1 (standard thread) · Strength class: 8 · Width across flats: 10 mm · Strength class: 10.9 · Thread length: 12 mm
12,60 EUR
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
82,30 EUR
GPO cylinder gasket set BAD ASS Lucifer / GPO Sombrero 41 mm | Puch X30 Velux, M50, MS
Thickness: 0.4 mm · Thickness: 0.45 mm · Manufacturer: GPO · Number of components: 4 pcs · Material: Aluminum · Material: Sealing paper · Ø cylinder: 41 mm · Ø outlet inside: 27 mm · Hole spacing outlet: 32 mm · Hole spacing inlet: 32 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Tuning
23,40 EUR
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
235,20 EUR
Explore categories from Cylinder
Moped fans also bought
Hot 
swiing® ingenious 15 mm carburetor camouflaged | Sachs 503
Manufacturer: swiing® ingenious parts · Mounting type: Plug connection clamped · Material: Aluminum · Component group Carburetor: Carburetor complete · Carburetor type: SRE · Nominal diameter: 15 mm · Camouflaged: Yes · Ø Inside entrance: 15 mm · Ø Internal connection: 20 mm · Total length: 66 mm · Ø Output inside: 15 mm · Width: 50 mm · Ø Air filter connection: 20 mm · Height: 95 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 · Area of application: Tuning · Clamping screw torque (max.): 4 N/m
94,00 EUR
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
144,60 EUR
GPO cylinder gasket set BAD ASS Lucifer / GPO Sombrero 41 mm | Puch X30 Velux, M50, MS
Thickness: 0.4 mm · Thickness: 0.45 mm · Manufacturer: GPO · Number of components: 4 pcs · Material: Aluminum · Material: Sealing paper · Ø cylinder: 41 mm · Ø outlet inside: 27 mm · Hole spacing outlet: 32 mm · Hole spacing inlet: 32 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Tuning
23,40 EUR
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
