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← Lambretta
Scooter · 1964

LI 150 Special

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MotoLibrary Score
36 /100 Commuter
Power/Weight
0.08 hp/kg
Top Speed
85 km/h
Engine
148 ccm

1964 Lambretta LI 150 Special Technical Analysis & Specification Breakdown

At the heart of the 1964 Lambretta LI 150 Special scooter motorcycle, Lambretta utilizes a 148 cc (9 cu in) air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 8.3 HP (6 kW) at 5,300 rpm. With a specific output of 56.1 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the LI 150 Special measures 104.8 kg (231 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.63 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,290 mm (50.8 in) wheelbase engineered for quick, flickable steering geometry.

Within MotoLibrary's Lambretta archive, this model family spans 4 indexed model years from 1963 to 1966, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.

Specific Output
56.1 HP/L
Power-to-Weight
0.08 HP/kg (12.63 kg/HP)
Engine
Displacement 148.0 ccm (9.03 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details Single cylinder, two-stroke
Power 8.3 HP (6.0 kW)) @ 5300 RPM
Compression 7.5:1
Bore x Stroke 57.0 x 58.0 mm (2.2 x 2.3 inches)
Fuel System Carburettor. DellÓrto
Cooling Air
Performance
Top Speed 85.3 km/h (53.0 mph)
Chassis
Wheelbase 1290 mm (50.8 inches)
Wheels & Brakes
Front Tyre 3.50-10
Rear Tyre 3.50-10
Front Brakes Expanding brake (drum brake)
Rear Brakes Expanding brake (drum brake)
Wheels Spoked
Dimensions & Weight
Dry Weight 104.8 kg (231.0 pounds)
Power/Weight 0.0787 HP/kg
Overall Height 1060 mm (41.7 inches)
Overall Length 1825 mm (71.9 inches)
Overall Width 710 mm (28.0 inches)
Other
Starter Kick
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Power
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Weight
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Brakes
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Rider Profile

Who Is This Bike For?

🟢
Beginner
A2 license compatible, manageable power.
🏙️
Best For
City & Commuting
⚖️
Handling
Very lightweight — easy to handle
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