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.
| 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 |
| Nominal diameter | 44 mm |
| 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
Manufacturer: GPO · Material: Steel · Surface: burnished · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Number of components: 7 pcs · Width across flats: 10 mm · Width across flats: 17 mm · Total length: 130 mm · Area of application: (Dis)assembly tool
23,20 EUR
GPO 44 mm cylinder kit tuning 12 mm KoBo | Tomos A35
Manufacturer: GPO · Material: Aluminum · Camouflaged: No · Surface: sandblasted · Displacement: 65 ccm · Crankshaft stroke: 43 mm · Nominal diameter: 44 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) · Ø piston pin (B): 12 mm · Number of fixing points: 4 pcs · Hole spacing outlet: 42 mm · Outlet type: slanted · Hole pattern [mm]: 44 x 44 · Thread outlet: M6x1 (standard thread) · Decompressor: No · Hole spacing inlet: 36 mm · Hole spacing inlet: 39 mm · Area of application: Tuning
104,90 EUR
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 · Nominal diameter (thread): 6 mm · Thread length: 12 mm · Thread type: M6x1 (standard thread) · Strength class: 10.9 · Total length: 30 mm
2,10 EUR
NTN 6203 C3 Ball bearing 17/40/12
Stock number: 6203 · Inner ring width: 12 mm · Manufacturer: NTN · Bearing clearance: C3 · Bearing cage: Sheet steel cage ball-guided · Groove ring: No · Material: Steel · Bearing type: Deep groove ball bearing · Ø inside: 17 mm · Ø outside: 40 mm · Ball bearing closed: No · Width: 12 mm · Area of application: Standard
10,40 EUR
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 · Area of application: Gearbox lubrication with clutch · Gearbox type: Foot control · Gearbox type: Manual gearshift
12,70 EUR
28,22 EUR/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 inlet: 38 mm · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 mm · Decompressor: Yes
11,60 EUR
DMP 44 mm cylinder head (higher compression) | Tomos
Manufacturer: DMP · Material: Aluminum · Surface: glass bead blasted · Width: 145 mm · Height: 66 mm · Total length: 145 mm · Ø cylinder: 44 mm · Area of application: Racing · Area of application: Tuning · Candle thread: short · Number of fixing points: 4 pcs · Hole pattern [mm]: 44 x 44 · Ø screw holder: 8 mm
69,90 EUR
Working late? Evening hours on Thursday until 20:00
