38 mm piston kit with two 1.5 mm rectangular piston rings with flank lock (FS) for your Tomos Funtastic, Funsport, Roadie moped / moped with A55 engine.
The detailed dimensioning 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.
The piston kit contains pistons, piston pins, piston clips and piston rings.
Note: The piston can also be used on Tomos mopeds with an A35 engine, provided the intake and exhaust are also replaced
You can find more piston kits, the corresponding assembly tools and, if necessary, the right cylinder in the accessories section.
Quality product from the Italian manufacturer Vertex.
| Manufacturer | Vertex |
| Ø outside piston (A) | 37.97 mm |
| Compression height (C) | 22.5 mm |
| Curvature (D) | 3 mm |
| Total piston height (E) | 52 mm |
| Number of piston rings (F) | 2 pcs |
| Nominal diameter | 38 mm |
| Piston ring mold | Rectangular ring |
| Piston ring impact | Flank safety device (FS) |
| Piston ring height | 1.5 mm |
| Ø piston pin (B) | 12 mm |
| Weight piston kit | 70 g |
| Tomos | Fun Sport'R Roadie |
Ratings
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Manufacturer: GPO · Area of application: (Dis)assembly tool · Material: Steel · Surface: burnished · Number of components: 7 pcs · Total length: 130 mm · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Width across flats: 10 mm · Width across flats: 17 mm
CHF 19.90
Airsal piston 38 mm (12 mm KoBo) | Tomos A35
Manufacturer: Airsal · Ø outside piston (A): 37.95 mm · Ø piston pin (B): 12 mm · Compression height (C): 22.5 mm · Curvature (D): 3.85 mm · Total piston height (E): 52.35 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 38 mm · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.5 mm
CHF 49.90
Airsal piston 44 mm (10 mm KoBo) | Tomos A35
Manufacturer: Airsal · Ø outside piston (A): 43.95 mm · Ø piston pin (B): 10 mm · Compression height (C): 21.1 mm · Curvature (D): 3.7 mm · Total piston height (E): 49.2 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 · Weight piston kit: 83 g
CHF 46.90
Airsal 44 mm piston (12 mm KoBo) | Tomos A55
Manufacturer: Airsal · Ø outside piston (A): 43.95 mm · Ø piston pin (B): 12 mm · Compression height (C): 22.2 mm · Curvature (D): 3.8 mm · Total piston height (E): 62.65 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 · Weight piston kit: 92 g
CHF 46.90
GPO piston 44 mm (12 mm KoBo) | Tomos A3/A35
Manufacturer: GPO · Ø outside piston (A): 43.96 mm · Ø piston pin (B): 12 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
CHF 37.90
Piston 45 mm (12 mm KoBo) | Tomos A3 / A35
Ø outside piston (A): 44.94 mm · Ø piston pin (B): 12 mm · Compression height (C): 22 mm · Curvature (D): 4 mm · Total piston height (E): 49.55 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 45 mm · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.5 mm · Weight piston kit: 91 g
CHF 34.90
Vertex piston 39 mm (12 mm KoBo) oversize | Tomos A55
Manufacturer: Vertex · Ø outside piston (A): 38.95 mm · Ø piston pin (B): 12 mm · Compression height (C): 22.5 mm · Curvature (D): 3.5 mm · Total piston height (E): 50 mm · Number of piston rings (F): 2 pcs · Nominal diameter: 39 mm · Piston ring mold: L-ring · Piston ring mold: Rectangular ring · Piston ring impact: Flank safety device (FS) · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.5 mm · Piston ring height: 2 mm · Weight piston kit: 81 g
CHF 79.90
Explore categories from Piston
Moped fans also bought
Fortune / Merrick 2.00-2.25 x 16" / 17" inner tube
Manufacturer: Fortune · Tire width: 2 - 2.5 " · Tire width: 2.25 - 2.5 " · Tire width: 2.5 " · Width: 2 " · Width: 2 1/4 " · Width: 2 1/2 " · Tire width [mm]: 50.8 - 63.5 · Old designation: 20 x 2 " · Old designation: 20 x 2.25 " · Old designation: 20 x 2.5 " · Old designation: 21 x 2 " · Old designation: 21 x 2.25 " · Old designation: 21 x 2.5 " · Tire height [%]: 100 · Wheel size: 16 - 17 " · Wheel size: 17 " · Valve type: TR4 Auto valve
CHF 10.50
swiing® revival light switch MERIT two buttons
Manufacturer: swiing® revival parts · Housing material: Steel · Substructure material: Plastic · Surface: chrome-plated · Color: Chrome · Color: black · Height: 30 mm · Functions: High beam (headlights) · Functions: Horn · Functions: Light off · Functions: Low beam · Functions: Motor stop · Number of positions: 3 pcs · Total length: 55 mm · Ø Handlebars: 22 mm · Width: 27 mm
CHF 18.90
Not in stock
ESJOT drive chain 415H (reinforced) 114L (1A quality)
Chain type: 415H · Chain pitch: 1/2" x 3/16" · Manufacturer: ESJOT · Material: Steel · Surface: blank / oiled · Color: gray · Rolling circumference: 1448 mm · Number of chain links: 114 pcs · Chain lock type: Spring lock · Ø bore: 4.05 mm · Ø Pin: 4 mm
CHF 18.90
swiing® revival gearbox cover gasket | Sachs 503 AAL, ABL, AB, AC, ADV, 2AL, 2BL (A1888)
Width: 130 mm · Thickness: 0.35 mm · Manufacturer: swiing® revival parts · Material: Sealing paper · Number of components: 1 pcs · Total length: 200 mm · Color: sand-colored · Number of fixing points: 6 pcs · Pony OEM number: A1888 · Sachs OEM no.: 0250 150 000
CHF 5.40
Dell'Orto 14/9 P SHA carburetor hand choke | Tomos
Manufacturer: Dell'Orto · Material: Aluminum · Camouflaged: No · Component group Carburetor: Carburetor complete · Carburetor type: SHA · Color: black · Height: 82 mm · Nominal diameter: 9 mm · Nominal diameter: 14 mm · Nozzle thread: M5x0.8 (standard thread) · Mounting type: Plug connection clamped · Total length: 58 mm · Ø without reducing sleeve: 21 mm · Nozzle size: 49 · Ø Inside entrance: 9 mm · Ø Internal connection: 18 mm · Ø Output inside: 14 mm · Ø Air filter connection: 56 mm · Ø Air filter connection: 59 mm · Width: 90 mm · Mixed oil connection: No · Vacuum connection: No · Choke control: Hand choke · Area of application: Original · Tomos OEM number: 1236202
CHF 85.90
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
