VNA/VNB was the prefix for the 125cc models. The "A" were the first ones produced and were then followed by the "B" models when the rear of the frame was flattened out.
With the exception of the headset, the bodies on the VNA/VNB and VBA/VBB are identical.
The horn design was changed to one which had horizontal lines on the 125 VNA/VNB. Early 125cc scooters had a small taillight which was similar to that on the handlebars.The design was later changed and it had a red lens on top. This taillight was then used on the 125cc models. The VNA/VNB 125cc models used a small square shaped speedometer. Late 125cc Vespas used the clamshell speedometer as well. Early VNA's had a split headset design which allowed for easy access to the control cables. Piaggio discontinued using this design on later versions of the VNA, and did not add this feature to other Vespas until the advent of the P-series in the late 1970's.
The early 125's used a small high tension ignition coil which was housed on the stator plate, and had fewer coils. The later 125's had a stator with three coils and a large external high tension ignition coil housed in a bakelite case and had points ignition.
The very early VNA motors for 1958 had a motor with a sort of "hybrid" design. They had a similar layout to the later motors, but were not rotary valve. They used a 5% two stroke mixture and by 1959, this system was gone in favor of the vastly superior rotary valve design.
125 VNA/VNB Vespas are a bit too slow to keep up with traffic with poor acceleration and top speed limits them. Only 6 volt lighting and 8" tires doesn't help eather. Engines on these scooters are simple and very reliable
Vespa 125 - Series description
VNA1T 1957-1958
VNA2T 1958-1959
VNB1T 1959-1961 (#1 series - MK1)
VNB2T 1961-1961 (#1 series - MK1)
VNB3T 1961-1962 (#2 series - MK2)
ELECTRICAL SYSTEM: mixed AC and DC 6v 6v, HT coil external rectifier 35W Fuse 8A, 6v Battery - 4Ah. (from the VNB3 VNB5 the 6v AC system is not used then the battery and rectifier). LIGHT FRONT: Lighthouse diameter 105 (115 from VNB3), filaments bulb 6v - 6v position lamp 25/25W + - 3W (6v - 5w on VNB3T) REAR LIGHT: license plate light bulb 6v - 3W (6v - 5W on VNB3T) + 6v brake light - 10W
VNB4T 1962-1963 (#2 series - MK2)
VNB5T 1963-1964 (#3 series - MK3)
VNB6T 1964-1965 (#3 series - MK3)
Vespa 125 - Technical specification
| Frame type | Rim | Gears | speed km/h | Specification | |
|---|---|---|---|---|---|
VNA1T 1957-1958VNA1M |
largeframe | 8" | 3 gears | 75 km/h | engine: single cylinder, air cooled 2-stroke induction: piston ported bore: 54 mm stroke: 54 mm cubic capacity: 123.67 cc compression ration: 6.3: 1 bhp at rpm: 4.5 @ 5000 lubrication:5% transmission: 3 speed constant mesh 1st gear: 12.20: 1 2nd gear: 7.60: 1 3rd gear: 4.85: 1 cutch: wet - multiplate carburetor: Dell'Orto UA/16S1 main jet: 72 slow running jet: 38 needle jet: 2.60 needle position: 2 throttle valve: No 50 ignition: contact breaker & coil ignition timing: 28 deg. BTDC breaker gap: 0.3 - 0.5 mm voltage: 6 volt wheels: 8" tires: 3.50 x 8 max speed: 47 mph |
VNA2T 1958-1959VNA2M |
largeframe | 8" | 3 gears | 75 km/h | engine: single cylinder, air cooled 2-stroke induction: disc valve bore: 54 mm stroke: 54 mm cubic capacity: 123.67 cc compression ration: 6.3: 1 bhp at rpm: 4.5 @ 5000 lubrication:5% 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 UA/16S1 main jet: 72 slow running jet: 38 needle jet: 2.60 needle position: 2 throttle valve: No 50 ignition: contact breaker & coil ignition timing: 28 deg. BTDC breaker gap: 0.3 - 0.5 mm voltage: 6 volt ENGINE: 2-stroke, 123.7 d.c. Bore: 54 mm. STROKE: 54 mm. POWER: 4.5 HP at 5000 rpm SAFC: 6,5:1 TRANSMISSION: 3 Speed, clutch friction plates 3 POWER: Ported Piston to cylinder, Dell'Orto SI 16 AU with air filter WHEELS: 3.50 × 8 SUSPENSION: Coil spring and hydraulic shock absorber with double conical spring return on the front, variable rate coil spring double cone coaxial double-acting hydraulic shock absorber on the rear Brakes: front drum, rear drum ELECTRICAL: AC 6V LIGHT FRONT: Lighthouse diameter 105, filaments bulb 6v - 6v position lamp 25/25W + - 3W) REAR LIGHT: 6v - 3W COLOR: VNA1: Grey (Max Meyer Code 15046) VNA2: Grey Light Beige (Max Meyer Code 150099) RUST: Grey (Max Meyer Code 8012M) COVER: Aluminum (Code Max Meyer 1.268.0983) TANK: 7.7 liters, subject |
VNB1T 1959-1961 (#1 series - MK1)VNB1M |
largeframe | 8" | 3 gears | 75 km/h | 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: 4.6 @ 5000 lubrication:2% transmission: 3 speed constant mesh primary drive: 22/67 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 max stator output: 6v - 30w max speed: 49 mph |
VNB2T 1961-1961 (#1 series - MK1)VNB2M |
largeframe | 8" | 3 gears | 75 km/h | 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: 4.6 @ 5000 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 |
VNB3T 1961-1962 (#2 series - MK2)VNB3M |
largeframe | 8" | 3 gears | 78 km/h | 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: 4.6 HP at 5000 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 LIGHT ODOMETER: 6v - 0.6 W FRAME COLOR: (1960-1961) Heavenly Light Grey (Code Max Meyer 1.298.8840) (1962 VNB3) Grey (Max Meyer Code 15210) (1962 VNB4) Light Grey (Code Max Meyer 1.298.8707) (1963 VNB5) Amethyst Grey (Code Max Meyer 1.298.8710) COVER COLOR: Aluminium (Code Max Meyer 1.268.0983) RUST: Hazel (Max Meyer Code 3000M) TANK: 7.7 liters, subject |
VNB4T 1962-1963 (#2 series - MK2)VNB4M |
largeframe | 8" | 3 gears | 78 km/h | 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 |
VNB5T 1963-1964 (#3 series - MK3)VNB5M |
largeframe | 8" | 4 gears | 78 km/h | engine: single cylinder, air cooled 2-stroke induction: disc valve bore: 52.5 mm stroke: 57 mm cubic capacity: 123.4 cc compression ration: 7.7: 1 bhp at rpm: 5.3 @ 5000 lubrication:2% transmission: 4 speed constant mesh 1st gear: 12.20: 1 2nd gear: 7.60: 1 3rd gear: 4.85: 1 4th gear: 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 tire: 3.00 x 8 tire pressure (front): 17 psi tire pressure (rear solo): 23 psi tire pressure (rear w/passenger): 32 psi |
VNB6T 1964-1965 (#3 series - MK3)VNB6M |
largeframe | 8" | 4 gears | 78 km/h | engine: single cylinder, air cooled 2-stroke induction: disc valve bore: 52.5 mm stroke: 57 mm cubic capacity: 123.4 cc compression ration: 7.7: 1 bhp at rpm: 5.3 @ 5000 lubrication:2% transmission: 4 speed constant mesh 1st gear: 12.20: 1 2nd gear: 7.60: 1 3rd gear: 4.85: 1 4th gear: 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 tire: 3.00 x 8 tire pressure (front): 17 psi tire pressure (rear solo): 23 psi tire pressure (rear w/passenger): 32 psi |
Vespa 125 - VIN numbers; VIN serial numbers; Chassis number
| VIN prefix | Year | VIN Chassis Number | Vespas made | ||
|---|---|---|---|---|---|
VNA1T |
VNA1T | 1957 | 1001 - 10300 | 9 299 | |
| VNA1T | 1958 | 10301 - 68031 | 57 730 | ||
VNA2T |
VNA2T | 1958 | 68032 - 107007 | 38 975 | |
| VNA2T | 1959 | 107008 - 116431 | 9 423 | ||
VNB1T #1 series - MK1 |
VNB1T | 1959 | 1001 - 16275 | 15 274 | |
| VNB1T | 1960 | 16276 - 80686 | 64 410 | ||
| VNB1T | 1961 | 80687 - 89850 | 9 163 | ||
VNB2T #1 series - MK1 |
VNB2T | 1961 | 1001 - 34699 | 33 698 | |
VNB3T #2 series - MK2 |
VNB3T | 1961 | 34700 - 54414 | 19 714 | |
| VNB3T | 1962 | 54415 - 90395 | 35 980 | ||
VNB4T #2 series - MK2 |
VNB4T | 1962 | 90396 - 99700 | 9 304 | |
| VNB4T | 1963 | 99701 - 136485 | 36 784 | ||
VNB5T #3 series - MK3 |
VNB5T | 1963 | 1001 - 7070 | 6 069 | |
| VNB5T | 1964 | 7071 - 43240 | 36 169 | ||
VNB6T #3 series - MK3 |
VNB6T | 1964 | 1001 - 7455 | 6 454 | |
| VNB6T | 1965 | 7456 - 35439 | 27 983 | ||
| VNB6T | 1966 | 35440 - 37028 | 1 588 |
Useful Vespa 125 links
VNA1T http://www.scooterhelp.com/scooters/VNA1T.125.html
VNA2T http://www.scooterhelp.com/scooters/VNA2T.125.html
VNB1T http://www.scooterhelp.com/scooters/VNB1T.125.html
VNB2T http://www.scooterhelp.com/scooters/VNB2T.125.html
VNB3T http://www.scooterhelp.com/scooters/VNB3T.125.html
VNB4T http://www.scooterhelp.com/scooters/VNB4T.125.html
VNB5T http://www.scooterhelp.com/scooters/VNB5T.125.html
VNB6T http://www.scooterhelp.com/scooters/VNB6T.125.html
If you know any usefull link about this vespa - please let us know about it - vespalatvia@gmail.com
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