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Lambretta (Innocenti) J 100 (Cento)
Description
Lambretta Junior
In 1964 Innocenti introduced a whole new scooter family with the Junior range. The simple and lightweight construction of the scooters should allow for lower prices and therefore appeal to new groups of customers.
The construction bears some similarities to Piaggio scooters by using a monocoque chassis. Also the access to the carburettor under a small plastic toolbox under the seat is similar to the smallframe Vespas. The engine however is placed centrally in the chassis and constructed along the lines of the larger LI series, even if the cylinder sits upright instead of lying horizontally. Depending on the model, a dual seat, a single seat or two single seats were fitted.
The engine is covered by side panels, which had external handles on most models. Most rubber parts were coloured grey, apart from the kickstart rubber and the stand feet, which came in black colour.
J100
The Cento (Italian for 100) was the first model of the Junior range and was flawed by the unusual capacity, even if market research had predicted that 100cc would be the ideal engine size. It was therefore soon accompanied by a 125cc version simply called J 125. Both models had a dual seat, three-speed gearbox and 3.00 10 wheels. The Cento had a power output of 4.7 hp and nearly reached 80 kph, while the J 125 broke this barrier with its 5.8 hp.
Production numbers were 17.643 for the Cento until November 1965, and 21.651 for the J 125 until October 1966.
| Model: Capacity: Production period: Quantity: Production code: 1st frame no.: |
J100 100 cc 03/64-11/65 17.642 100LB 800.001 |
J100
(March 1964 until November 1965)
No major changes during the production run. From December 1964 rectangular instead of round steering lock base.
Original paint (Lechler)
| Avorio Chiaro 8054 |
 |
| Vehicle (general) | |
|---|---|
| name: | J 100 (Cento) |
| year of manufacture: | 1964, 1965 |
| VIN: | 100LB |
| no. of exemplars produced: | 17642 |
| colours: | avorio chiaro (8054) |
| Vehicle sizes | |
| length: | 1690 mm |
| width: | 630 mm |
| height: | 1020 mm |
| seat height: | 770 mm |
| wheelbase: | 1190 mm |
| petrol tank capacity: | 6.2 l |
| tank reserve (petrol): | 1 l |
| weight (dry): | 90 kg |
| weight (max): | 230 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: | 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 with separate reservoir |
| Vehicle engine | |
| displacement: | 98 cm³ |
| stroke: | 48 mm |
| bore: | 51 mm |
| engine type: | 2-stroke |
| number of cylinders: | 1 |
| type of cooling: | air |
| power (kW): | 3.46 kW |
| power (HP): | 4.7 |
| rpm (P max): | 5300 |
| compression ratio: | 1:7.5 |
| mixture preparation: | carburettor |
| carburettor: | Dell'Orto SHB 16-18 |
| starter: | kickstarter |
| clutch: | manual |
| engine brand: | Innocenti |
| max speed: | 77 km/h |
| engine type: | 2-stroke |
| emission standard: | none |
| Vehicle engine - ignition | |
| ignition type: | point set ignition |
| advanced ignition: | 24 |
| 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:: | 3.21 |
| ratio speed 1 - 1:: | 4.8 |
| ratio speed 2 - 1:: | 2.87 |
| ratio speed 3 - 1:: | 1.86 |
| overall ratio - 1:: | 5.97 |
| Fahrzeug Betriebsstoffe | |
| fuel: | Super (ROZ 95) |
| mix ratio: | 1:50 |
| gearbox oil: | SAE80 |
| gearbox oil capacity: | 0.5 l |
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