VBA

From scoot.net

Jump to: navigation, search

The Vespa VBA replaced the VB1 and was the first engine with rotary valve induction

Contents

Specifications=

Manufactured: 1958 - 1960
max speed: 53 mph

Serial Range

1958 VBA1T 1001-16515
1959 VBA1T 16516-88519
1960 VBA1T 88520-125040

Engine

145.5 cc single cylinder, air cooled 2-stroke
barrel: 2 transfer ports
induction: disc valve
bore: 57 mm
stroke: 57 mm
compression ration: 6.5: 1
bhp at rpm: 5.5 @ 5000
lubrication:2%

transmission

3 speed constant mesh
1st gear: 12.20: 1
2nd gear: 7.46: 1
3rd gear: 4.73: 1
clutch: wet - multiplate

Carburetor

BEFORE serial #97500
Dell'Orto SI 20/17A
main jet: 95
slow running jet: 42
diffuser: E1
main air bleed: 200
throttle valve: No 5.0

AFTER serial #97500
Dell'Orto SI 20/17B
main jet: 100
slow running jet: 42
diffuser: E1
main air bleed: 200
throttle valve: No 5.0

Electrical

ignition: contact breaker & coil
ignition timing: 28 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
max stator output: 6v - 35w

External Links

VBA electrical diagram for bikes before SN 76050

Retrieved from "http://scoot.net/faq/VBA"
Personal tools