S p e c s:

unknown
engine: single cylinder, air cooled 2-stroke
barrel: 2 transfer ports
induction: disc valve
bore: 55 mm
stroke: 51 mm
cubic capacity: 121.1 cc
compression ratio: 8.2: 1
bhp at rpm: 5.6 @ 5500
transmission: 4 speed constant mesh
1st gear: 14.74: 1
2nd gear: 9.80: 1
3rd gear: 7.06: 1
4th gear: 5.31: 1
clutch: wet - multiplate
lubrication: 2% (pre-mix)
carburetor: Dell'Orto SHB 19/19
main jet: 74
slow running jet: 45
throttle valve: No 2
starter jet: 60
ignition: contact breaker & coil
ignition timing: 24 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
wheels: 10"
tires: 3.00 x 10"
max speed: 56 mph
 
click for the VMA2T electrical page
This bike differs from the Vespa Primavera only by having a legshield mounted toolbox instead of the typical left hand side cowl glovebox, and had a spare wheel attachment that positioned the spare around the rear light.