Cylinder
Piston
Piston rings
Head
Article
31 7903
Ø 47 mm
31 8691
Ø 55 mm
Stroke
43 mm
Compression ratio
12,5:1
No. 2 rectangular section 1.5 mm
No. of transferts
6
hemispherical
Spark plug
central
alluminium alloy 21%
PIAGGIO PIAGGIO APE 50 2T <-1989