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Lambretta (Innocenti) J 125
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.
J100/125
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.
J125 Starstream & Super Starstream
From May 1966 the J 125 was marketed as a facelifted version called J 125 Starstream. It received narrower legshields, a new seat and the new “Stellina” badge. The engine is nearly the same as the J 125's, but now features a four-speed gearbox.
A special version of the Starstream was produced for the British market only, called the Super Starstream. It featured a newly cast horncasting plus a unique turning front mudguard and came with a two-tone paint scheme with white as a base and blue or red horncasting and panels.
Thanks to the new four-speed gearbox, the Starstream and Super Starstream accelerated much faster than their predecessor and reached a healthy 87 kph top speed. Production of the Starstream and Super Starstream models was halted in April 1966.
| Model: Capacity: Production period: Quantity: Production code: 1st frame no.: |
J125 (3 speed) 125 cc 09/64-09/66 21.651 J125 600.001 |
| Model: Capacity: Production period: Quantity: Production code: 1st frame no.: |
J125 (4 speed) 125 cc 05/66-04/69 16.052 J125 6150.001 |
J125 3-speed – 1st version
(September 1964 to Dezember 1964)
Round steering lock base, front fork with screw-in buffers.
J125 3-speed – 2nd version
(January 1965 to September 1966)
Rectangular steering lock base, clip-on front fork buffers. From January 1966 simplified side panel fittings.
J125 4-speed – Starstream & Super Starstream
(May 1966 to April 1969)
No changes during the production run. Part of the production was fitted with horncasting and turning mudguard as Super Starstream.
Original paint (Lechler)
| J125 3-speed | |
| Grigio Met. 8060 |
 |
| Azzurro Met. 8062 |
 |
J125 4-speed |
|
| Bianco 8059 |
 |
| Blu 041 Suzuki |
 |
| Vehicle (general) | |
|---|---|
| name: | J 125 |
| year of manufacture: | 1964, 1965, 1966 |
| VIN: | J125 |
| no. of exemplars produced: | 21651 |
| colours: | azzuro met (8062), grigio met (8060) |
| 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: | 122.5 cm³ |
| stroke: | 48 mm |
| bore: | 57 mm |
| engine type: | 2-stroke |
| number of cylinders: | 1 |
| type of cooling: | air |
| power (kW): | 4.27 kW |
| power (HP): | 5.8 |
| rpm (P max): | 5300 |
| compression ratio: | 1:7.45 |
| mixture preparation: | carburettor |
| carburettor: | Dell'Orto SHB 16-18 |
| starter: | kickstarter |
| clutch: | manual |
| engine brand: | Innocenti |
| max speed: | 68.9 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:: | 4.36 |
| ratio speed 2 - 1:: | 2.63 |
| ratio speed 3 - 1:: | 1.76 |
| overall ratio - 1:: | 5.66 |
| Fahrzeug Betriebsstoffe | |
| fuel: | Super (ROZ 95) |
| mix ratio: | 1:50 |
| gearbox oil: | SAE80 |
| gearbox oil capacity: | 0.5 l |
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