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Lambretta (Innocenti) Lui 75 (75 S, 75 SL, Vega, Cometa)
Description
Lambretta Lui
(like Luna, Vega & Cometa)
The Lui (also called Vega in some export markets) was designed to secure the market share in the 50cc class, after the J-range only achieved disappointing sales figures. To keep the production cost down, the scooter's equipment was reduced to the necessary minimum. In order to avoid a cheap appearance, Nuccio Bertone, a renowned vehicle designer was given the task of creating a suitable livery for the lightweight model. Indeed his design for Lui and Vega was a futuristic masterpiece which looks just as up-to-date today as in 1968, when the slogan “All for Lui and Lui for all” was created.
The frame consists of a front and a rear piece. While the front is made from conventional tubular steel, the rear is a pressed steel item. The suspension was adapted from the J-range, while the brake drums were made entirely from steel. Most of the mechanical system was taken over from the J.
Lui 75 S & SL
Only a few months after the launch of the Lui 50, Innocenti presented the Lui 75 at the 15th Tokyo Motor Show, being the only European exhibitor present. The Lui 75, also dubbed Vega, was available in two versions: S and SL. Compared to the 50cc models, the 75 had a upgraded electric system to power high beam and brake light. Similar to the 50 S both 75 versions had a dual seat and a motocross-style up-and- over exhaust. The engine's power output was 5,2 hp, giving a rather quick acceleration thanks to the 4-speed gearbox.
The main difference between the S and the SL however is the autolube system called “Lubematic”. It was the first autolube system fitted to a mass-production Italian scooter.
Both versions were only available in two colour schemes: Ochre and metallic grey. The main visible difference between the two is a Lubematic sticker at the legshiels of the SL.
| Model: Capacity: Production period: Quantity: Production code: 1st frame no.: |
Lui 75 75 cc 08/68-12/70 9.402 20/9 650.001 |
Lui 75 S, SL – 1st version
(March 1968 until beginning of 1969)
Lambretta badge at the left of the legshields over the 50 C or CL badge, no ball-ends at the levers, chromed grille behind the headlight.
Lui 75 S, SL – 2nd version
(beginning of 1969 until December 1970)
No Lambretta badge at the legshields, ball-end brake and clutch levers, chromed grille behind the headlight with Innocenti label. Few scooters have an additional little Innocenti badge over the Lui badge.
Original paint (Lechler)
| Grigio Met. (Silber) 8060 |
 |
| Giallo Ocra (Ocker) 8080 |
 |
| Vehicle (general) | |
|---|---|
| name: | Lui 75 (75 S, 75 SL, Vega, Cometa) |
| year of manufacture: | 1968, 1969, 1970 |
| VIN: | 20/8 |
| no. of exemplars produced: | 9402 |
| colours: | ocra (8080) |
| Vehicle sizes | |
| length: | 1700 mm |
| width: | 656 mm |
| height: | 1028 mm |
| seat height: | 770 mm |
| wheelbase: | 1202 mm |
| petrol tank capacity: | 6 l |
| tank reserve (petrol): | 0.8 l |
| weight (dry): | 76 kg |
| Vehicle wheels | |
| front tyre: | 3.00 - 10 |
| rear tyre: | 3.00 - 10 |
| front wheel rim: | 2.10 - 10 |
| rear wheel rim: | 2.10 - 10 |
| Vehicle brakes | |
| front brake type: | drum brake |
| front brake operation: | mechanical with cable |
| Ø front: | 125 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: | 74.4 cm³ |
| stroke: | 44 mm |
| bore: | 46.4 mm |
| engine type: | 2-stroke |
| number of cylinders: | 1 |
| type of cooling: | air |
| power (kW): | 3.68 kW |
| power (HP): | 5 |
| rpm (P max): | 6300 |
| compression ratio: | 1:9.3 |
| mixture preparation: | carburettor |
| carburettor: | Dell'Orto SH1/20 |
| starter: | kickstarter |
| clutch: | manual |
| engine brand: | Innocenti |
| max speed: | 82.5 km/h |
| engine type: | 2-stroke |
| emission standard: | none |
| Vehicle engine - ignition | |
| ignition type: | point set ignition |
| advanced ignition: | 21 |
| points distance: | 0.4 mm |
| power (light): | 33 W |
| voltage: | 6 V |
| spark plug: | (NGK) B7ES |
| Vehicle engine - gearbox | |
| gear change type: | manual |
| no. of gears: | 3 |
| ratio primary - 1:: | 3.538 |
| ratio speed 1 - 1:: | 5.44 |
| ratio speed 2 - 1:: | 3.538 |
| ratio speed 3 - 1:: | 2.625 |
| ratio speed 4 - 1:: | 1.95 |
| overall ratio - 1:: | 6.9 |
| Fahrzeug Betriebsstoffe | |
| fuel: | Super (ROZ 95) |
| mix ratio: | 1:50 |
| gearbox oil: | SAE80 |
| gearbox oil capacity: | 0.5 l |
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