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Lambretta (Innocenti) D 125
Description
Lambretta D & LD 125
In October 1954 the first Lambrettas with 150 cc capacity hit the market. The increased power output also brought an increase in top speed: Innocenti stated 88 kph as standard Vmax, while the consumption figures stayed the same as before. Also the open-frame D 150 models received the fan-driven cooling system of the LD version. Also the dreaded Teleflex gearchange-cable is finally superseded by two standard cables, a system to be continued with all subsequent Lambretta models. For the first time, a damper is mounted at the rear along the torsion springing to improve the handling.
In January 1957 a reworked LD model appeared, both in 125cc and 150cc capacity. The engines were left unchanged apart from the kickstart mechanism, however the outer appearance was significantly modernised.
The horn had been moved to the headset, were a speedometer was held by a newly-designed headset cover, which also covered all cables now. The rear of the scooter was redesigned and a cast rear light was bolted to the frame. A toolbox was fitted behind the passenger seat and the air induction is via the rear of the frame, which improved the rev-range of the engine.
| Model: Capacity: Production period: Quantity: Production code: 1st frame no.: |
125 D 125 cc 12/51-06/55 122.991 125D 00.001 |
125 D & LD – 1st version
(1951/52)
Alloy handlebars, electric system without battery and rectifier, 14mm gudgeon pin, round junction box beside the flywheel, exhaust with chromed silencer.
125 D & LD – 2nd version
(1953)
Electric system with battery and rectifier, exhaust with chromed silencer, altered fitting for rear damper, LD only: sand-coloured plastic grilles in side-panels.
125 D & LD – 3rd version
(1954)
Exhaust without chromed silencer, but with two large inspection bolts, 16mm gudgeon pin, additional oil drilling at the main shaft, rectangular junction box beside the flywheel, cables with grease-nipples at the headset, additional screw at the rear-wheel nut (lefthand- thread). LD only: rubber buffers for side-panels, larger handles at side-panels, chromed side-panel grilles.
Original paint (Lechler)
| Verde Olivia 8021 |
 |
| Beige Sabbia 8029 |
 |
| Camoscio Chiaro 8055 |
 |
| Vehicle (general) | |
|---|---|
| name: | D 125 |
| year of manufacture: | 1951, 1952, 1953, 1954, 1955 |
| VIN: | 125D |
| no. of exemplars produced: | 123141 |
| colours: | beige (8055), beige sabbia (8029), verde oliva (8021) |
| Vehicle sizes | |
| length: | 1770 mm |
| width: | 740 mm |
| height: | 960 mm |
| seat height: | 760 mm |
| ground clearance: | 110 mm |
| wheelbase: | 1281 mm |
| petrol tank capacity: | 6.3 l |
| tank reserve (petrol): | 0.7 l |
| weight (dry): | 79 kg |
| Vehicle wheels | |
| front tyre: | 4.00 - 8 |
| rear tyre: | 4.00 - 8 |
| front wheel rim: | 2.50 - 8 |
| rear wheel rim: | 2.50 - 8 |
| Vehicle brakes | |
| front brake type: | drum brake |
| front brake operation: | mechanical with cable |
| Ø front: | 100 mm |
| rear brake type: | drum brake |
| rear brake operation: | mechanical with cable, mechanical with rod |
| Ø rear: | 140 mm |
| Vehicle suspension | |
| front suspension type: | spring only, trailing link fork |
| rear suspension type: | torsion spring |
| Vehicle engine | |
| displacement: | 123 cm³ |
| stroke: | 58 mm |
| bore: | 52 mm |
| engine type: | 2-stroke |
| number of cylinders: | 1 |
| type of cooling: | air |
| power (kW): | 3.84 kW |
| power (HP): | 5.2 |
| rpm (P max): | 4750 |
| compression ratio: | 1:6.5 |
| mixture preparation: | carburettor |
| carburettor: | Dell'Orto MA18 B3 |
| starter: | kickstarter |
| clutch: | manual |
| engine brand: | Innocenti |
| max speed: | 78 km/h |
| engine type: | 2-stroke |
| emission standard: | none |
| Vehicle engine - ignition | |
| ignition type: | point set ignition |
| advanced ignition: | 27 |
| points distance: | 0.45 mm |
| power (light): | 30 W |
| voltage: | 6 V |
| spark plug: | (NGK) B8HS |
| Vehicle engine - gearbox | |
| gear change type: | manual |
| no. of gears: | 3 |
| ratio speed 1 - 1:: | 12.9 |
| ratio speed 2 - 1:: | 7.5 |
| ratio speed 3 - 1:: | 4.75 |
| Fahrzeug Betriebsstoffe | |
| fuel: | Super (ROZ 95) |
| mix ratio: | 1:25 |
| gearbox oil: | SAE50 |
| gearbox oil capacity: | 0.5 l |
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