VBB Vespa 150
Frame VBB1T · 1960–1962 · Large frame
Engine
TypeSingle cylinder, air cooled 2-stroke
InductionDisc valve
Bore × stroke57 mm × 57 mm
Displacement145.5 cc
Compression ratio6.5 : 1
Power5.5 bhp @ 5,000 rpm
Lubrication2% premix
Transmission
Type4 speed constant mesh
Primary drive22/67
1st gear13.35 : 1
2nd gear9.32 : 1
3rd gear6.64 : 1
4th gear4.73 : 1
ClutchWet, multiplate
Carburetor
CarburetorDell'Orto SI 20/17C
Main jet100
Slow-running jet42
Main air bleed185
DiffuserBE/1
Throttle valveNo 7.0
Ignition & Electrical
IgnitionContact breaker & coil
Timing28° BTDC
Breaker gap0.3–0.5 mm
Stator output6v - 35w
System6 volt
Wheels & Tires
Wheels8″
Wheel hubsCast w/cooling fins
Tires3.00 × 8