VNA Vespa 125
Frame VNA1T · 1957–1958 · Large frame
Engine
TypeSingle cylinder, air cooled 2-stroke
InductionPiston ported
Bore × stroke54 mm × 54 mm
Displacement123.67 cc
Compression ratio6.3 : 1
Power4.5 bhp @ 5,000 rpm
Lubrication5% premix
Transmission
Type3 speed constant mesh
1st gear12.20 : 1
2nd gear7.60 : 1
3rd gear4.85 : 1
ClutchWet, multiplate
Carburetor
CarburetorDell'Orto UA/16S1
Main jet72
Slow-running jet38
Needle jet2.60
Needle position2
Throttle valveNo 50
Ignition & Electrical
IgnitionContact breaker & coil
Timing28° BTDC
Breaker gap0.3–0.5 mm
System6 volt
Wheels & Tires
Wheels8″
Tires3.50 × 8
Performance
Top speed47 mph