Grand Sport pistons are special pistons manufactured in small series, with significantly better material properties than their original counterparts.
They are manufactured in Italy and offer the advantage of a higher silicon content (18%) than common pistons. This makes them thermally stable and very durable.

Some special versions also have thin and extremely stable steel piston rings. These have a clear advantage over cast iron piston rings in terms of resistance to breakage, speed and torsional stiffness. A nice feature for cylinders whose exhaust is to be designed much larger.


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Piston pin
Diameter
15 mm
Length
48.5 mm
 
Cylinder
Drill hole
57 mm
Motor type
2-Takt
 
Piston
Number of piston rings
2
Piston manufacturing method
gegossen
Pin position
mittig
Compression height
30 mm
Piston roof shape
konvex gewölbt
 
Piston rings
Piston ring type
Rechteck-Ring
Piston ring thickness
1,5mm
 
Piston clips
Piston clip type
Doppel G-Typ
Wire gauge Piston clip
1,0mm
 
OEM numbers (for comparison purposes only)
Scooter Center:
7672985