VLX Vespa PX150E

Frame VLX1T · 1978–1981 · PX

Engine

TypeSingle cylinder, air cooled 2-stroke

InductionDisc valve

Bore × stroke57.8 mm × 57 mm

Displacement149 cc

Compression ratio8.2 : 1

Power7.5 bhp @ 5,750 rpm

Lubrication2% (USA autolube)

Transmission

Type4 speed constant mesh

1st gear14.47 : 1

2nd gear10.28 : 1

3rd gear7.31 : 1

4th gear5.36 : 1

ClutchWet, multiplate

Carburetor

CarburetorDell'Orto SI 20/20 D

Venturi20 mm

Main jet116/100

Slow-running jet160/100

Mixer tubeBE 3

Atomiser280/100

Starter jet60/100

Throttle valve6823.01

Ignition & Electrical

IgnitionContact breaker & coil

Timing21° BTDC

Breaker gap0.3–0.5 mm

Spark plugNGK - B6HS

Spark plug gap0.6 mm

System12 volt