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Vespa (Piaggio) Vespa 125 (VNB6T)
Description
Vespa 125 (VNB3-VNB6)
Whoever says VNB2T will also say VNB3T. Piaggio did this in 1962 and presented a successor that had not changed under the hood. The changes were mainly cosmetic, so many features of the 150cc models are included. The handlebar head is now no longer divisible and is made of cast aluminium with a receptacle for the small, square speedometer, as known from the previous model. However, the diameter of the headlamp increases to 115 mm. The brake pedal is the same as on the 150, made of highly polished aluminium with a black brake pedal rubber.
The Vespa lettering and caliper are in a dark blue. The rear light is no longer painted but chrome-plated. Instead of the baseboards on the centre tunnel, the mat is now fitted with side trims. The front fender is shaped a little bit different than on the previous model and now has beading on the sides. The leg shield is beaded with an aluminium slotted tube.
With the VNB4T, also introduced in 1962, not so much changes. The proven engine is kept and also the frame changes only in the area of the license plate mounting, here the frame is now square. The scooter is delivered in a light grey (MaxMeyer 1.298.8707). The wheelbase is 2 cm shorter. The rear brake pads are now no longer attached overlapping to one bolt, but have two bolts. The side hoods are now upgraded with trim strips.
1963 the VNB5T is the first engine with a 4-speed transmission. The overall transmission ratio remained the same, but the gearbox was more closely stepped.
With the VNB6T only minor changes are made from 1964. For example, the nuts of the wheel mounting studs were reinforced (from 8 to 10 mm). In addition, the wheel nuts no longer have a welded joint. The tail light is that of the Super. From a technical point of view the compression of the 4-speed engine is increased from 7.2:1 to 7.7:1. This increases the power from 4.6 to 5.12 hp.
Frame numbers VNB6 by year of manufacture:
1964: VNB6T 1001-7455
1965: VNB6T 7456-35439
1966: VNB6T 35440-37028
Original paint VNB6 (MaxMeyer)
| Body: Azzurro Chiaro PIA400 (1.298.7400) |
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| Primer: Nocciola (Antiruggine) PIA3000M (3000M) |
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| Mounting parts: Alluminio PIA983 (1.268.0983) |
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| Vehicle (general) | |
|---|---|
| name: | Vespa 125 (VNB6T) |
| year of manufacture: | 1964, 1965, 1966 |
| VIN: | VNB6T |
| no. of exemplars produced: | 36028 |
| Vehicle sizes | |
| length: | 1725 mm |
| width: | 655 mm |
| height: | 985 mm |
| ground clearance: | 160 mm |
| wheelbase: | 1180 mm |
| petrol tank capacity: | 7.7 l |
| tank reserve (petrol): | 1.4 l |
| weight (dry): | 92 kg |
| weight (max): | 270 kg |
| Vehicle wheels | |
| front tyre: | 3.50 - 8 |
| rear tyre: | 3.50 - 8 |
| front wheel rim: | 2.15 - 8 |
| rear wheel rim: | 2.15 - 8 |
| Vehicle brakes | |
| front brake type: | drum brake |
| front brake operation: | mechanical with cable |
| Ø front: | 125 mm |
| rear brake type: | drum brake |
| rear brake operation: | mechanical with cable |
| Ø rear: | 127 mm |
| Vehicle engine | |
| displacement: | 123.4 cm³ |
| stroke: | 57 mm |
| bore: | 52.5 mm |
| engine type: | 2-stroke |
| number of cylinders: | 1 |
| type of cooling: | air |
| power (kW): | 3.75 kW |
| power (HP): | 5.1 |
| rpm (P max): | 5000 |
| compression ratio: | 1:7.7 |
| mixture preparation: | carburettor |
| carburettor: | Dell'Orto SI 20/15C, Dell'Orto SI 20/15D |
| starter: | kickstarter |
| clutch: | manual |
| engine brand: | Piaggio |
| max speed: | 78 km/h |
| engine type: | 2-stroke |
| emission standard: | none |
| Vehicle engine - ignition | |
| ignition type: | point set ignition |
| advanced ignition: | 26 |
| points distance: | 0.4 mm |
| power (light): | 30 W |
| voltage: | 6 V |
| Vehicle engine - gearbox | |
| gear change type: | manual |
| no. of gears: | 4 |
| ratio primary - 1:: | 3.045 |
| ratio speed 1 - 1:: | 4.385 |
| ratio speed 2 - 1:: | 3.059 |
| ratio speed 3 - 1:: | 2.182 |
| ratio speed 4 - 1:: | 1.593 |
| overall ratio - 1:: | 4.85 |
| Fahrzeug Betriebsstoffe | |
| fuel: | Super (ROZ 95) |
| mix ratio: | 1:50 |
| gearbox oil: | SAE30 |
| gearbox oil capacity: | 0.25 l |
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