S p e c s: VBA1T

1958 - 1960
engine: single cylinder, air cooled 2-stroke
barrel: 2 transfer ports
induction: disc valve
bore: 57 mm
stroke: 57 mm
cubic capacity: 145.5 cc
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
 
BEFORE serial #97500
carburetor: 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
carburetor: Dell'Orto SI 20/17B
main jet: 100
slow running jet: 42
diffuser: E1
main air bleed: 200
throttle valve: No 5.0
 
ignition: contact breaker & coil
ignition timing: 28 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
max stator output: 6v - 35w
max speed: 53 mph
 
click for the VBA1T electrical page