M and M Lambretta

Lambretta SX 150 / 200 Series III

  

Production Dates: October 1966 - January 1969 (150cc)
January 1966 - January 1968 (200cc)
Serial Number Range:
 750001 - 781238 (150cc)
830001 - 850783 (200cc)
Quantity Produced: 31,238 (150cc)
20,783 (200cc)
Main Specs:
Overall Length:
 1800 mm / 71 in
Overall Height: 1035 mm / 41 in
Overall Width:
 700 mm / 27.5 in
Wheelbase:
 1290 mm / 51 in
Weight (dry): ~104 kg / 229 lbs
~110 kg / 243 lbs
Gears: 4 speeds - Hand controlled
Speed Max:
 ~98 kmh / 61 mph (150)
~105 kmh / 65 mph (200)
Tire Size:
 3.50 x 10
Brakes:
 Front & Rear Finned Drums (150)
Front Inlaid Disk / Rear Finned Drum (200)
Fuel Tank:
 8 liters / 2.11gal -  0.5 liters / 0.13 gal reserve
Consumption:
 ~41 kpl / 118 mpg (150)
~33 kpl / 93 mpg (200)
Engine Specs:
Capacity (cc):
 148 & 198
Bore:
 57 mm (150)
66 mm (200)
Stroke:
 58 mm
Compression:
 7.8:1 (150)
7.3:1 (200)
Max Output:
 8.7 hp @ 6300 rpm (150)
10.3 hp @ 5500 rpm (200)
Cooling:
 Forced air
Carburettor:
Type:
 Dellorto SH1/20
Choke:
 20 mm
Slide:
 5914/2 (150)
5914/1 (200)
Needle:
 --
Atomizer:
 5899/5 (150)
5899/2 (200)
Main Jet:
 102 (150)
103 (200)
Pilot Jet:
 45 (150)
48 (200)
Starter Jet:
  50
Float:
 5.0 grams
Air Screw Adj:
 0.5 turn
Gearbox:
Ratio
1st:
 15.36 (150)
12.53 (200)
2nd:
 10.75 (150)
8.78 (200)
3rd:
 7.98 (150)
6.32 (200)
4th:
 5.65 (150)
4.84 (200)

Specs

Cluster Teeth
 Gear Teeth
1st:
 10 (150)
12 (200)
 50 (150)
49 (200)
2nd:
 12 (150)
14 (200)		 42 (150)
40 (200)
3rd:
 15 (150)
18 (200)		 39 (150)
37 (200)
4th:
 19 (150)
21 (200)		 35 (150)
33 (200)
Drive Sprocket:
 15
Crown Wheel:
 46

Service Info:
Spark Plug:
 Champion N3, N4
NGK B7ES, B8ES
Spark Plug Gap:
 0.020
Timing:
 23 degrees BTDC
Points Gap:
 0.35 - 0.45 mm
Engine Oil:
 --
Transmission Oil:
 SAE 90 0.5 - 0.7 liters
Tire Pressure:
 Front 18 psi / Rear 28 psi
Fuel Mix:
 150cc - 2% or 50:1
200cc - 4% or 25:1
Paint Information:
Lechler Color Name
 Lechler Color Code
Bianco Nuovo / New White 8059
Grigio Scuro / Dark Gray 8071
Azzurro Metallizato / Light Blue Metallic 8062
Rosso Corrallo / Coral Red 8065
Giallo Chiaro / Clear Yellow 8064


150cc:
Body:
Grigio Primavera 8070
Verde Mela 8039

Panel:
Red
Green
Blue
Gold

200cc:
Bianco Nuovo 8059
Model Notes:

 Early versions of the SX150 had the usual crest type of horn cast shield badge. Around the beginning of 1968, this badge was changed to the later metal square type. Also with this change, grey plastic tool boxes were fitted, as were clip on side panels. Wheels, hubs and forks were also changed to the Fiat 690 color code of silver instead of the earlier white.

As with the 150cc version, later models dropped the crest horn cast shield badge and adapted a square type of metal aluminum badge. Clip on side panels and grey plastic toolboxes were also introduced in the beginning of 1968. The very last SX200 models (autumn 1968) had their horn grill polished instead of being painted, along with the chrome front mudguard crest more normally found on the SX150 model.

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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