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Innocenti Lambretta LD 150 (1954-56)

Innocenti Lambretta LD 150 (1954-56)


Lambretta D & LD 150

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 Also the dreaded Teleflex gearchange-cable is finally superseded by two standard cables, a system to be continued with all subsequent Lambretta models.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.

Production period:
Production code:
1st frame no.:
150 LD
150 cc


Production period:
Production code:
1st frame no:
150 LD (electric start)
150 cc


150 D & LD – 1st version
(1954 to mid 1955)

Alloy handlebars, electric system without battery and rectifier, 14mm gudgeon pin, round junction box beside the flywheel, exhaust with chromed silencer.


150 D & LD – 2nd version
(1955 to mid 1956)

Electric system with battery and rectifier, exhaust with chromed silencer, altered fitting for rear damper, LD only: sand-coloured plastic grilles in side-panels.


150 D & LD – 3rd version
(Mitte 1956 bis Januar 1957)

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)

Grigio Chiaro
Beige Sabbia

from 1957 on:
Grigio Landa
8041 (*2)
Blu Brasile
0401 Fiat (*3)
Rosso Amaranto
8020 (*3)
Blu Inglese
8031 (*3)
Verde Smeraldo
8051 (*3)

(*1) = 1 colour painted frames
(*2) = 2 colour painted frames
(*3) = 2 colour painted side panels


Vehicle (general)
name: LD 150 (1954-56)
year of manufacture: 1954, 1955, 1956
VIN: 150LD
no. of exemplars produced: 109344
colours: beige sabbia (8029)
Vehicle sizes
length: 1770 mm
width: 740 mm
height: 960 mm
seat height: 760 mm
ground clearance: 115 mm
wheelbase: 1281 mm
weight (dry): 87 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
rear brake type: drum brake
rear brake operation: mechanical with cable
Vehicle suspension
front suspension type: spring only, trailing link fork
rear suspension type: shock absorber without spring, torsion spring
Vehicle engine
displacement: 148 cm³
stroke: 58 mm
bore: 57 mm
engine type: 2-stroke
number of cylinders: 1
type of cooling: air
power (kW): 4.45 kW
power (HP): 6.05
rpm (P max): 4600
compression ratio: 1:6
mixture preparation: carburettor
carburettor: Dell'Orto MA19 B4
starter: kickstarter
clutch: manual
engine brand: Innocenti
max speed: 80 km/h
engine type: 2-stroke
emission standard: none
Vehicle engine - ignition
ignition type: point set ignition
advanced ignition: 25
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
Fahrzeug Betriebsstoffe
fuel: Super (ROZ 95)
mix ratio: 1:25
gearbox oil: SAE50
gearbox oil capacity: 0.5 l
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