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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 The TV (GT) 200 was superseded by the SX 200, while the SX 150 replaced the 150 Special.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 Also, the steel toolbox was replaced by a plastic item and the rectangular Innocenti badge superseded the previous shield.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 |
 |
| Biancospino 8082 |
 |
| Verde Mela 8039 |
 |
| Arancio 8037 |
 |
| 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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