S p e c s: VBB1T

1960 - 1962
engine: single cylinder, air cooled 2-stroke
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: 4 speed constant mesh
primary drive: 22/67
1st gear: 13.35: 1
2nd gear: 9.32: 1
3rd gear: 6.64: 1
4th gear: 4.73: 1
clutch: wet - multiplate
 
Before serial #31001
carburetor: Dell'Orto SI 20/17B
After serial #31001
carburetor: Dell'Orto SI 20/17C
main jet: 100
slow running jet: 42
diffuser: BE/1
main air bleed: 185
throttle valve: No 7.0
ignition: contact breaker & coil
ignition timing: 28 deg. BTDC
breaker gap: 0.3 - 0.5 mm
voltage: 6 volt
max stator output: 6v - 35w
wheels: 8"
wheel hubs: cast w/cooling fins
tires:3.00 x 8
 
click for the VBB1T electrical page
 

Note: Aluminum trim on the side cowls appeared after serial # 71001 (1961)
Note: Before serial number 31001 the choke was engaged by a small adjustable flap at the carb box intake. After 31001 the carb box had the flap removed and the choke was made integral to the carburetor itself. The carburetor can be seen here.