VMA Vespa Primavera
Frame VMA1T · 1965–1967 · Small frame
Engine
TypeSingle cylinder, air cooled 2-stroke
InductionDisc valve
Bore × stroke55 mm × 51 mm
Displacement121.1 cc
Compression ratio7.2 : 1
Power4.5 bhp @ 5,700 rpm
Lubrication2% (pre-mix)
Transmission
Type4 speed constant mesh
Primary drive24/61
1st gear14.74 : 1
2nd gear9.80 : 1
3rd gear7.06 : 1
4th gear5.31 : 1
ClutchWet, multiplate
Carburetor
CarburetorDell'Orto SHB 16/16
Main jet74
Slow-running jet42
Starter jet50
Throttle valveNo 2
Ignition & Electrical
IgnitionContact breaker & coil
Timing24° BTDC
Breaker gap0.3–0.5 mm
System6 volt 50W
Wheels & Tires
Wheels10″
Tires3.00 × 10