M and M Lambretta

Lambretta Model D (MK1 / MK2 / MK3)


Model D - MK1
Production Dates: December 1951 to Janurary 1953
Serial Number Range:
 000001 - 069000
Quantity Produced: 69,000
Main Specs:
Overall Length:
 1770 mm / 70 in
Overall Height: 960 mm / 38 in
Overall Width:
 760 mm / 29 in
Weight (dry): ~70 kg  / 154 lbs
Gears: 3 speeds - Hand controlled Teleflex cable
Speed Max:
 ~75kmh / 47 mph
Tire Size:
 4.00 x 8
Brakes:
 Drums Front & Rear
Fuel Tank:
 6 liters / 1.32 gal -  0.7 liters / 0.15 gal reserve
Consumption:
 ~50 kpl / 141 mpg
Engine Specs:
Capacity (cc):
 123
Bore:
 52 mm
Stroke:
 58 mm
Compression:
 6:3
Max Output:
 5.0 bhp @ 4600 rpm
Cooling:
 Air
Carburettor:
Type:
 Dellorto MA 18 B2
Choke:
 18 mm
Slide:
 75
Needle:
 D1
Atomizer:
 255 B
Main Jet:
 70
Pilot Jet:
 45
Starter Jet:
  --
Float:
 6.5 grams
Air Screw Adj:
 1- 2 turns
Service Info:
Spark Plug:
 Champion L5, L11S
NGK B7HS
Spark Plug Gap:
 0.015
Timing:
 26 degrees BTDC
Points Gap:
 0.40 - 0.50 mm
Engine Oil:
 SAE 15/50 180 grams
Transmission Oil:
 Special grease
Tire Pressure:
 Front 16 psi / Rear 24 psi
Fuel Mix:
 5% or 20:1
Paint Information:
Lechler Color Name
 Lechler Color Code
Verde Oliva / Olive Green 8021
Camoscio Chiaro / Light Chamois 8055
Beige Sabbia 8029


125 D:
All the same color Olive Green 8021 or Light Chamois 8055 exception for the seat frame, toolbox tube, centerstand, wheels, wheel hubs, torsion bar, license plate holder and frame are painted Fiat Aluminum 690.  The engine case and air filter box are also painted Fiat Aluminum 690.
Model Notes:

 The D can be identify as three different versions.  The Model D and LD were also among the first versions  to be made outside Italy as Innocenti sold license for production around the world.

First Version 1951-52:
Chromed steel handlebars with aluminum endcaps, rod-controlled rear brake (starting mid-1952 this was changed to a cable together with larger brake pedal rubber), the underseat toolbox tube was conical shaped with a self-locking lid (the lid was modified to secure using a spring starting in mid-1952), brown seat covers.

Second Version 1953:
Adjustable aluminum handlebars with plastic levers, larger rear brake pedal, cable-controlled rear brake, cylindrical toolbox tube with lid secured with spring, brown seat covers.

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Model D - MK2
Production Dates: April 1953 - October 1954 (125)
October 1954 - December 1955 (150)
Serial Number Range:
 069001 - 122641 (125)
005001 – 038758 (150)
Quantity Produced: 53,641 (125)
33,758 (150)
Main Specs:
Overall Length:
 1770 mm / 70 in
Overall Height: 960 mm / 38 in
Overall Width:
 760 mm / 29 in
Weight (dry): ~70 kg  / 154 lbs (125)
~75 kg /  165 lbs (150)
Gears: 3 speeds - Hand controlled Teleflex cable (125)
3 speeds - Hand controlled  (150)
Speed Max:
 ~75 kmh / 47 mph (125)
~80 kmh / 50 mph (150)
Tire Size:
 4.00 x 8
Brakes:
 Drums Front & Rear
Fuel Tank:
 6 liters / 1.32 gal -  0.7 liters / 0.15 gal reserve
Consumption:
 ~50 kpl / 141 mpg
Engine Specs:
Capacity (cc):
 123 / 148
Bore:
 52 mm (125)
57 mm (150)
Stroke:
 58 mm
Compression:
 6.3:1 (125)
6.5:1 (150)
Max Output:
 5.0 bhp @ 4600 rpm (125)
6.0 bhp @ 4600 rpm (150)
Cooling:
 Air
Carburettor:
Type:
 Dellorto MA 18 B3 (125)
Dellorto MA 18 B4 (150)
Choke:
 18 mm (125)
19 mm (150)
Slide:
 75
Needle:
 D1 (125)
D3 (150)
Atomizer:
 255 B
Main Jet:
 70 (125)
72 (150)
Pilot Jet:
 45 (125)
40 (150)
Starter Jet:
 50 (125)
55 (150)
Float:
 6.5 grams
Air Screw Adj:
 1- 2 turns
Service Info:
Spark Plug:
 Champion L7, L10S
NGK B7HS
Spark Plug Gap:
 0.015
Timing:
 26 degrees BTDC
Points Gap:
 0.40 - 0.50 mm
Engine Oil:
 SAE 15/50 180 grams
Transmission Oil:
 SAE 140 100 grams
Tire Pressure:
 Front 16 psi / Rear 24 psi
Fuel Mix:
 6% or 17:1
Paint Information:
Lechler Color Name
 Lechler Color Code
Verde Oliva / Olive Green
 8021
Camoscio Chiaro / Light Chamois 8055
Beige Sabbia 8029
Grigio Chiaro / Light Grey
 8012

Lechler Color Codes

125 D:
All the same color Olive Green 8021 or Light Chamois 8055 exception for the seat frame, toolbox tube, centerstand, wheels, wheel hubs, torsion bar, license plate holder and frame are painted Fiat Aluminum 690.  The engine case and air filter box are also painted Fiat Aluminum 690.
Model Notes:

 Rear brake was now operated by cable instead of a rod. Slightly changed handle bar shape.

Third Version 1954-1955:
Adjustable front brake and clutch controls at handlebars, dark green seat covers, lock on rear toolbox (valid only for the D)

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Model D - MK3
Production Dates: May 1955 - November 1956 (125)
January 1956 -  December 1956 (150)
Serial Number Range:
 122642 - 123142 (125)
038759 – 059593 (150)
Quantity Produced:
500 (125)
20,835 (150)
Main Specs:
Overall Length:
 1770 mm / 70 in
Overall Height: 960 mm / 38 in
Overall Width:
 760 mm / 29 in
Weight (dry): ~70 kg  / 154 lbs (125)
~75 kg /  165 lbs (150)
Gears: 3 speeds - Hand controlled cable
Speed Max:
 ~75 kmh / 47 mph (125)
~80 kmh / 50 mph (150)
Tire Size:
 4.00 x 8
Brakes:
 Drums Front & Rear
Fuel Tank:
 6 liters / 1.32 gal -  0.7 liters / 0.15 gal reserve
Consumption:
 ~50 kpl / 141 mpg
Engine Specs:
Capacity (cc):
 123 / 148
Bore:
 52 mm (125)
57 mm (150)
Stroke:
 58 mm
Compression:
 6.3:1 (125)
6.5:1 (150)
Max Output:
 5.0 bhp @ 4600 rpm (125)
6.0 bhp @ 4800 rpm (150)
Cooling:
 Air
Carburettor:
Type:
 Dellorto MA 18 B3 (125)
Dellorto MA 19 B4 (150)
Choke:
 18 mm (125)
19 mm (150)
Slide:
 75
Needle:
 D1 (125)
D3 (150)
Atomizer:
 255 B
Main Jet:
 68 (125)
72 (150)
Pilot Jet:
 40
Starter Jet:
 55
Float:
 6.5 grams
Air Screw Adj:
 1- 2 turns
Service Info:
Spark Plug:
 Champion L7, L10S
NGK B7HS
Spark Plug Gap:
 0.015
Timing:
 26 degrees BTDC
Points Gap:
 0.40 - 0.50 mm
Engine Oil:
 SAE 15/50 180 grams
Transmission Oil:
 SAE 140 100 grams
Tire Pressure:
 Front 16 psi / Rear 24 psi
Fuel Mix:
 6% or 17:1
Paint Information:
Lechler Color Name
 Lechler Color Code
Camoscio Chiaro / Light Chamois 8055
Beige Sabbia 8029

Lechler Color Codes
Model Notes:

 Twin cable gear change instead of Teleflex from older models

Sources used for the above information:
1. Publication Section
2. Peter Davies - information reproduced with written permission
3. Paint colors - many various sources from the UK
4. Model notes - many various sources from the UK

Details pertaining to restoration broken down by VIN range, obtained from Casa Lambretta USA and reproduced with written permission.



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