For the general specifications overview see the MK D or MK LD page.
Identification details 150 D-LD
Version I 1954-mid-1955 Handlebar in aluminium, electrical system without battery and without current rectifier, 14mm gudgeon pin, cylindrical power socket at flywheel, 3notch gear shift, smooth starter casing (small bush on the cover of the last examples from mi-1955), silencer with chromed expansion box.
150 LD only: beige plastic air vent grilles on side panels.
Version II 1955-mid-1956 Electrical system with battery and rectifier, starter casing with three-screw cover, silencer with chromed expansion box, rear damper location (less inclined).
150 LD only: beige plastic air vent grilles on side panels.
Version III mid-1956-end of production Silencer without expansion box and with two brass inspection caps, 16mm gudgeon pin, additional oil vent on final drive, quadrangular power socket at flywheel attached with a screw, control cables with lubricators at steering head, cylinder air manifold with central crest for the attachment screws, chromed steel handlebar, 5-notch gearshift, additional left-hand screw on the rear hub nut.
150 LD only: bump-stops with screws supporting the side panels, larger levers on the panels, side panel air vent grilles in chromed metal.
Identification details 125 LD deriv.
Version I to mid-1955 Silencer with chromed expansion box, beige plastic air vent grilles on side panels, 3-notch gearshift, floorboard runners with rubber inserts ( as on the 150 LD), HT coil inside the flywheel magneto ( earliest examples only).
Version II mid-1956-end of production Silencer without exoansion box and with two brass inspection caps, side panel air vent grilles in chromed metal, 5-notch gearshift, chomed steel handlebar,cvontrol cables with lubricators, cylinder air manifold with central crest for the attachment screws
Identification details 125 LD deriv. 150
Model destined for the Swiss market. In effect a 150 D reduced to 125 CC; the only aesthetic differences concern the elimination of the front 150D script. Engine specification identical to the 125 LD derivata.
Colours scheme and finishes 150D
Body colour parts Fork, fork covers, frame, leg-shield, fuel tank, glovebox and cover, 2 glovebox cross-members,headlamp, front and rear mudguards, wheel hubs, wheel rims, front brake shoe backing plate, front and rear saddle frames (including all the small springs), stand, 2 underfloor cross-members, soare wheel holder, license plate holder (painted in aluminium on the first 8000 examples) and iuts bracket, torsion bar lever, cylinder head air intake manifold(4 pieces), upper part of damper, battery holder, round rectifier cover and its bracket, steering head badge mount.
Aluminium paint Tool-carrier tube and its cover, license plate holder (first 8000 examples only).
Crankcase (all castings) and intake manifold Aluminium paint.
Carburettor Air filter painted aluminium silver, burnished body, zinc-plated screws and fittings, float chamber in bare aluminium.
Control cable sheaths Grey.
Saddles Dark green imitation leather with “Innocenti” rear script.
Silencer Matte black (in some cases the header is chromed, chrine-plated supplenentary
Colour schemes and finishes 150 LD and 125 deriv.
Body colour parts Fork, fork covers, frame, leg-shield, fuel tank, headlamp btacket, front and rear mudguards, side-panels, wheel hubs, front brake shoe backing plate, front and rear saddle frames (inclding all the small springs), spare wheel holder, license plate and its brackets, torsion bar lever, cylinder head air intake manifold (4 pieces), stand, upper part of damper, battery holder, round rectifier cover and its bracket, leg-shield internal glovebox (150 LD only).
Aluminium paint Tool- carrier tube and its cover, license plate holder (first 8000 examples only).
Crankcase Aluminium paint (earliest examples only, successively bare aluminium)(.
Engine parts alway painted aluminium Air intake manifold, complete gear change casing.
Control cable sheaths Grey.
Saddles Dark green, imitation leather with “Innocenti” rear script.
Silencer Matte black, chromed supplementary expansion chamber.
Chromed parts
Frame Handlebar (if in steel) and its details, brake pedal, front saddle conical spring and rear saddle spring-tie-bar-cap, passenger footrest support rod, rear glovebox lock cover, steeringhead cable clip (150 D). Choke knob, steeringhead upper bearing support plate, side-panel grilles (125-150 LD). Speedometer bezel (150 LD).
Electrical parts Headlamp and tail lamp surrounds, horn grille, light switch cover.
Engine Kick-start pedal, supplementary expansion chamber.
Wheels Large cap nuts (2 front, 1 rear).
Cadmium-plate parts
Front fork Front wheel carriers, screws and pins.
Frame All screws and bolts, torsion bar figure-of-eight clip, special washers, bushes.
Electrical parts Light switch cover scres, horn stem and clip (150 D).
Engine Levers, studs, screws.
Wheels Nuts, bushes, wheel hub brake levers.
Attention! Note towards mid-1954 cadmium plating (similar to white zinc was introduced in place of nickel plating. This new treatment was adopted once the stock of nickel-plated material was exhausted; it is therefore possible to find 1954-55 Lambrettas with both nickel- and plate-plated parts.
Nickel-plated parts
Lubricator, oil caps, 14mm wheel nuts, lower part of rear damper.
Burnished parts
Engine Large and small Allen bolts, engine pivot.
Polished parts
Frame Handlebar (if in aluminium), central clamp and lever carriers, floorboard runners, fuel tap lever. Side-panel levers, and floornoard runner ferrules (150 LD).
Engine Kick-start lever (earliest examples of 150LD, lever in aluminium).
Lechler system colours
Sand beige 8029
Light grey 8012 (a number of 1956 examples only)
Aluminium (engine and frame) Fiat 690
Maintenance data
Fuel/oil mixture 6%
Spark plug Bosch 225 short thread
Engine oil SAE 15/50, 500g
Carburettor Dell’Orto MA 19B4 (150 cc),
max jet 72, min 40 – Valve 75
Carburettor Dell’Orto MA 18B4 (150 cc),
max jet 70, min 45 – Valve 75
Ignition advance 24°-26° 4-4.6mm ahead of top dead centre