VLB Vespa Sprint 150

Frame VLB1T · 1965–1974 · Large frame

TypeSingle cylinder, air cooled 2-stroke

Barrel2 transfer ports

InductionDisc valve

Bore × stroke57 mm × 57 mm

Displacement145.5 cc

Compression ratio7.5 : 1

Power7.1 bhp @ 5,000 rpm

Lubrication2% (USA autolube)

Type4 speed constant mesh

Primary drive22 clutch - 67 input shaft

1st gear14.46 : 1

2nd gear10.28 : 1

3rd gear7.36 : 1

4th gear5.36 : 1

ClutchWet, multiplate

CarburetorDell'Orto SI 20/17D

Main jet102

Slow-running jet42

Main air bleed140

DiffuserE1

Starter jet60

Throttle valveNo 0

IgnitionContact breaker & coil

Timing22° BTDC

Breaker gap0.3–0.5 mm

Stator output6v - 50w

System6 volt

Wheels10″

Tires3.50 × 10

Top speed62 mph