
44.0 mm replacement piston with two 1.5 mm rectangular piston rings with internal fuse (IS) for the 44 mm racing cylinder for your Tomos S25/2, A38B and A35 moped / moped.
The detailed dimensions of the piston according to the technical drawing can be found in the details. You can also find out about the relevant piston rings, their stems and locking types on the legend in the pictures.
| Nominal diameter | 44 mm |
| Manufacturer | GPO |
| Ø outside piston (A) | 43.96 mm |
| Compression height (C) | 21.9 mm |
| Curvature (D) | 4.15 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) |
| Piston ring height | 1.5 mm |
| Ø piston pin (B) | 12 mm |
| Tomos |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Total length: 130 mm · Manufacturer: GPO · Material: Steel · Surface: burnished · Number of components: 7 pcs · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Area of application: (Dis)assembly tool · Width across flats: 10 mm · Width across flats: 17 mm
EUR 24.50
GPO 44 mm cylinder kit tuning 12 mm KoBo | Tomos A35
Nominal diameter: 44 mm · Manufacturer: GPO · Material: Aluminum · Camouflaged: No · Area of application: Tuning · Surface: sandblasted · Displacement: 65 ccm · Crankshaft stroke: 43 mm · Ø cylinder neck: 47.8 mm · Ø outlet inside: 22.8 mm · Hole spacing inlet: 36 mm · Hole spacing inlet: 39 mm · Inlet window: 35.5 x 29.5 · Thread inlet: M5x0.8 (standard thread) · Hole pattern [mm]: 44 x 44 · Number of fixing points: 4 pcs · Ø piston pin (B): 12 mm · Outlet type: slanted · Hole spacing outlet: 42 mm · Thread outlet: M6x1 (standard thread) · Decompressor: No
EUR 110.60
EUR 98.30
Explore categories from Piston
Moped fans also bought
NTN 6203 C3 Ball bearing 17/40/12
Bearing cage: Sheet steel cage ball-guided · Ø inside: 17 mm · Ø outside: 40 mm · Inner ring width: 12 mm · Manufacturer: NTN · Bearing clearance: C3 · Groove ring: No · Material: Steel · Surface: blank · Stock number: 6203 · Bearing type: Deep groove ball bearing · Width: 12 mm · Area of application: Standard · Ball bearing closed: No
EUR 10.90
Motorex engine oil (gear oil) manual 450 ml
Manufacturer: Motorex · Viscosity (SAE): 80W · Area of application: Gearbox lubrication with clutch · Oil type: GL4 · Contents: 450 ml · Gearbox type: Foot control · Gearbox type: Manual gearshift · Temperature resistance (min.): -30 - 220 °C
EUR 13.40
EUR 29.78/l
Airsal gasket set 44 - 45 mm
Manufacturer: Airsal · Material: Aluminum · Material: Sealing carton · Material: Sealing paper · Number of components: 4 pcs · Ø cylinder: 44 mm · Ø cylinder: 45 mm · Hole spacing inlet: 38 mm · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes · Area of application: Tuning
EUR 12.20
DMP 44 mm cylinder head (higher compression) | Tomos
Total length: 145 mm · Manufacturer: DMP · Material: Aluminum · Surface: glass bead blasted · Ø cylinder: 44 mm · Width: 145 mm · Height: 66 mm · Ø screw holder: 8 mm · Candle thread: short · Hole pattern [mm]: 44 x 44 · Area of application: Racing · Area of application: Tuning · Number of fixing points: 4 pcs
EUR 73.70








