44.0 mm replacement piston with two 1.5 mm rectangular piston rings with internal locking (IS) for the 44 mm racing cylinder for your Puch moped as well as Tomos S25/2, A38B, or A35 mopeds.
You can find the detailed dimensions of the piston, as shown in the technical drawing, in the product details. You can also find information about the standard piston rings, their clearances, and retaining methods in the legend accompanying the images.
The package includes piston pins, piston clips, and piston rings.
Note: Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
You’ll find the necessary installation tools, piston pin retainers, and, if needed, the corresponding cylinder in the accessories section.
A good, affordable standard replacement part. GPO – GOOD PARTS ONLY.
| Manufacturer | GPO |
| Ø outside piston (A) | 43.96 mm |
| Compression height (C) | 21.9 mm |
| Curvature (D) | 4.15 mm |
| Nominal diameter | 44 mm |
| Total piston height (E) | 49.55 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 |
| Piston ring height | 1.5 mm |
| Puch |
| Tomos |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Material: Steel · Surface: burnished · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Total length: 130 mm · Width across flats: 10 mm · Width across flats: 17 mm · Area of application: (Dis)assembly tool
EUR 23,40
GPO 44 mm cylinder kit tuning 12 mm KoBo | Tomos A35
Manufacturer: GPO · Material: Aluminum · Camouflaged: No · Surface: sandblasted · Nominal diameter: 44 mm · Displacement: 65 ccm · Crankshaft stroke: 43 mm · Ø piston pin (B): 12 mm · Ø cylinder neck: 47.8 mm · Ø outlet inside: 22.8 mm · Inlet window: 35.5 x 29.5 mm · Thread inlet: M5x0.8 (standard thread) · Area of application: Tuning · Number of fixing points: 4 pcs · Hole spacing inlet: 36 mm · Hole spacing inlet: 39 mm · Outlet type: slanted · Hole pattern [mm]: 44 x 44 · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Decompressor: No
EUR 105,80
Explore categories from Piston
Moped fans also bought
Hot 
swiing® revival Stud Bolt, Inlet/Outlet M6x30 (Grade 10.9)
Manufacturer: swiing® revival parts · Material: Steel · Surface: galvanized (blue) · Diameter: 5.95 mm · Thread type: M6x1 (standard thread) · Thread length: 12 mm · Total length: 30 mm · Nominal diameter (thread): 6 mm · Strength class: 10.9
EUR 2,10
NTN 6203 C3 Ball bearing 17/40/12
Manufacturer: NTN · Stock number: 6203 · Inner ring width: 12 mm · Ball bearing closed: No · Bearing clearance: C3 · Bearing cage: Sheet steel cage ball-guided · Groove ring: No · Material: Steel · Ø outside: 40 mm · Bearing type: Deep groove ball bearing · Width: 12 mm · Ø inside: 17 mm · Area of application: Standard
EUR 10,50
Motorex engine oil (gear oil) manual 450 ml
Temperature resistance (min.): -30 - 220 °C · Manufacturer: Motorex · Oil type: GL4 · Viscosity (SAE): 80W · Contents: 450 ml · Gearbox type: Foot control · Area of application: Gearbox lubrication with clutch · Gearbox type: Manual gearshift
EUR 13,50
EUR 30,00/l
Airsal gasket set 44 - 45 mm | Puch
Manufacturer: Airsal · Material: Aluminum · Material: Sealing carton · Material: Sealing paper · Area of application: Tuning · Number of components: 4 pcs · Ø cylinder: 44 mm · Ø cylinder: 45 mm · Hole spacing outlet: 42 mm · Hole spacing inlet: 38 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes
EUR 11,70
DMP 44 mm cylinder head (higher compression) | Tomos
Manufacturer: DMP · Material: Aluminum · Surface: glass bead blasted · Ø cylinder: 44 mm · Number of fixing points: 4 pcs · Ø screw holder: 8 mm · Hole pattern [mm]: 44 x 44 · Candle thread: short · Total length: 145 mm · Width: 145 mm · Height: 66 mm · Area of application: Racing · Area of application: Tuning
EUR 70,50
Working late? Evening hours on Thursday until 20:00
