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Lambretta (Innocenti) LD 125 (1951-55)
Description
Lambretta D & LD 125
In December 1951 Innocenti introduced the 125 Model D, which featured a newly designed frame and a greatly improved chassis. Tank, toolbox and saddle were continued without changes. Overall, the D was basically an improved model C, also the appearance was very close to that of its predecessor.
The engine however was reworked and equipped with a new, larger Dell'Orto MA 18 carburettor. The three-speed gearbox is still hand-operated by Teleflex cable, but power output is improved to 5 hp and nearly 80kph top speed.
Brake performance is also improved by the introduction of cooling fins on the brake drums. The first D models still had the rear-brake operated by a rod-linkage like the Model C, while this was later superseded by a cable. The front suspension is now integrated into the forks, a system Innocenti used right up to the DL. At the rear, a torsion bar takes care of the suspension.
| Model: Capacity: Production period: Quantity: Production code: 1st frame no..: |
125 LD 125 cc 12/51-10/55 110.334 125LD 00.001 |
| Model: Capacity: Production period: Quantity: Production code: 1st frame no..: |
125 LD (Elestart) 125 cc 02/54-12/54 8.694 125LD 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: | LD 125 (1953-55) |
| year of manufacture: | 1951, 1952, 1953, 1954, 1955 |
| VIN: | 125LD |
| no. of exemplars produced: | 110334 |
| 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): | 85 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 B2, Zenith 19 MCT |
| 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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