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Innocenti Lambretta SX 150 (X 150 Special)

Innocenti Lambretta SX 150 (X 150 Special)

Description


Lambretta SX 150
Series 3

The Lambretta Special X is derived from the Special and TV models. The TV (GT) 200 was superseded by the SX 200, while the SX 150 replaced the 150 Special. The exciting and timeless shape of the bodywork was mainly retained. The main difference between the SX 150 and the Special was the colour scheme. The silver paint is replaced by off-white or apple green (which apparently was not in great demand). In addition the SX 150 features a chromed mudguard crest and a polished horn grille. Both SX 150 and 200 have a large “X” plus the respective capacity stated over the Special badge on the legshields. The rear frame badge not reads “Innocenti” on both models.

Engine-wise the 150 gets its deserved makeover and now uses the SH20 carburettor as well. Combined with a new cylinder, peak performance is increased t 9,38 hp, giving a top speed of 96 kph. Also the SX 150 is the only Lambretta that uses two cylinder head gaskets at least if you don't count the twin cylinder prototypes.

Towards the end of the production the side-panel handles were replaced by steel clips under the panels, the same system to be used by the later DL. Also, the steel toolbox was replaced by a plastic item and the rectangular Innocenti badge superseded the previous shield. The last models of the SX 200 had the wheel-rims and brake-drums painted silver.

After three years and 31.238 scooters built, production of the SX 150 ceased in January 1969.

 

Model:
Capacity:
Production period:
Quantity:
Production code:
1st frame no.:
SX 150
150 cc
10/66-01/69
31.238
150SX
750.001

 

SX 150 – 1st version
(October 1966 until beginning of 1968)

Painted toolbox made from steel, screw-in forklink buffers.

 

SX 150 – 2nd version
(beginning of 1968 until autumn 1968)

Rectangular horncasting badge, unpainted plastic toolbox, clip-on forklink buffers.

 

SX 150 – 3rd version
(autumn 1968 until winter 1968)

Other colours, all M8 nuts now have 13mm spanner size.

 

Original paint (Lechler)

Primavera Grigio
8070
Farbkarte
Biancospino
8082
Farbkarte
Verde Mela
8039
Farbkarte
Arancio
8037
Farbkarte
 
Vehicle (general)
name: SX 150 (X 150 Special)
year of manufacture: 1966, 1967, 1968, 1969
VIN: SX150
no. of exemplars produced: 31238
colours: grigio primavera (8070), verde mela (8039)
Vehicle sizes
length: 1800 mm
width: 700 mm
height: 1035 mm
seat height: 785 mm
ground clearance: 165 mm
wheelbase: 1290 mm
petrol tank capacity: 9 l
tank reserve (petrol): 0.75 l
weight (dry): 105 kg
weight (kerb): 120 kg
weight (max): 260 kg
Vehicle wheels
front tyre: 3.50 - 10
rear tyre: 3.50 - 10
front wheel rim: 2.15 - 10
rear wheel rim: 2.15 - 10
Vehicle brakes
front brake type: drum brake
front brake operation: mechanical with cable
Ø front: 150 mm
rear brake type: drum brake
rear brake operation: mechanical with cable
Ø rear: 150 mm
Vehicle suspension
front suspension type: spring only, trailing link fork
rear suspension type: shock absorber
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): 6.07 kW
power (HP): 8.25
rpm (P max): 5590
compression ratio: 1:7
mixture preparation: carburettor
carburettor: Dell'Orto SH1/18
starter: kickstarter
clutch: manual
engine brand: Innocenti
max speed: 92.2 km/h
engine type: 2-stroke
emission standard: none
Vehicle engine - ignition
ignition type: point set ignition
advanced ignition: 23
points distance: 0.4 mm
power (light): 30 W
voltage: 6 V
spark plug: (NGK) B7ES
Vehicle engine - gearbox
gear change type: manual
no. of gears: 4
ratio primary - 1:: 3.0666
ratio speed 1 - 1:: 4.545
ratio speed 2 - 1:: 3.154
ratio speed 3 - 1:: 2.294
ratio speed 4 - 1:: 1.842
overall ratio - 1:: 5.649
Fahrzeug Betriebsstoffe
fuel: Super (ROZ 95)
mix ratio: 1:50
gearbox oil: SAE80
gearbox oil capacity: 0.7 l
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