S p e c s: VNB4T

1962 - 1963
engine: single cylinder, air cooled 2-stroke
induction: disc valve
bore: 52.5 mm
stroke: 57 mm
cubic capacity: 123.4 cc
compression ration: 7.2: 1
bhp at rpm: ?
lubrication:2%
transmission: 3 speed constant mesh
1st gear: 12.20: 1
2nd gear: 7.60: 1
3rd gear: 4.85: 1
clutch: wet - multiplate
carburetor: Dell'Orto SI 20/15B
main jet: 82
slow running jet: 42
diffuser: E2
main air bleed: 150
throttle valve: No
ignition: contact breaker & coil
ignition timing: 26 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
 
click for the VNB4T electrical page