VSD Vespa Rally 180
Frame VSD1T · 1968–1973 · Large frame
Engine
TypeSingle cylinder, air cooled 2-stroke
Barrel3 transfer ports
InductionDisc valve
Bore × stroke63.5 mm × 57 mm
Displacement180.69 cc
Compression ratio8 : 1
Power10.3 bhp @ 5,700 rpm
Lubrication2% premix
Transmission
Type4 speed constant mesh
1st gear14.47 : 1
2nd gear9.84 : 1
3rd gear6.81 : 1
4th gear5.08 : 1
ClutchWet, multiplate
Carburetor
CarburetorDell'Orto SI 20/20 D
Main jet109
Slow-running jet50
Mixer tubeBE 2
Starter jet60
Ignition & Electrical
IgnitionContact breaker & coil
Timing22° BTDC
Breaker gap0.3–0.5 mm
System6 volt
Wheels & Tires
Wheels10″
Wheel hubsCast w/cooling fins
Tires3.50 × 10
Tire pressure (front)16 psi
Tire pressure (rear, solo)20 psi
Tire pressure (rear, 2-up)32 psi
Performance
Top speed62 mph