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Lambretta (Innocenti) LI 150 Special (LIS 150)

Lambretta (Innocenti) LI 150 Special (LIS 150)


Lambretta Li Special 150
Series 3

The LI 150 Special was offered from 1963 and closed the gap between the Lambretta LI and TV. Designed as a sportier version of the LI it looks astonishingly similar to the TV. Only the badges, colour scheme and the missing disc brake at the front make clear that this was indeed a completely different model. The dual seat was fitted as standard.

The engine now had a modified cylinder with a newly designed head, which is responsible for the increase in power by 1,65 hp compared to the LI, giving a power output of 8,25 hp. As the production code of the engine is still 150LI, the engine can only be distinguished by the wider silent blocks.

The 150 Special's gearbox has a closer ratio which makes it highly sought-after by tuners from the start. However the third gear, even if strong enough for all standard scooters, unfortunately proves too weak for tuned engines, causing frequent gearbox failures. This was later overcome when Innocenti introduced an uprated version. As the 150 Special was advertised in the UK with the band Gerry and the Pacemakers (initially the Beatles were asked), the scooter is often referred to as the Pacemaker.

When sales started to dwindle in the mid-sixties, Innocenti decided to introduce two special versions of the 150 Special, the Silver and Golden Special. The scooters were painted in a silver and golden paint scheme, which is not too spectacular in the case of the Silver Special, as they were available in silver anyway. The only difference in this case was the small “Silver” badge at the legshields. The Golden Special however came in a unique gold-metallic colour scheme. The “Golden” badge plus the dark green dual seat additionally set the scooter apart from the standard models.

Altogether, 69.529 LI 150 Specials were built, which almost all left the factory in their silver or golden livery. Only for the British market a different two-tone colour scheme with white base paint and a number of colour options for the panels was available. The Pacemaker was sometimes even shown with a disc brake in some adverts, but apparently never sold like that.

From October 1965 on, also a 125 version of the Special is produced. Besides the badges and the metallic blue paint scheme, there is no visible difference between the 125 and the 150. Technically however the 125 is ahead of its elder brother. The combination of 20mm carburettor, new cylinder porting, raised compression and central squish head produced 7.12 hp and 90 kph top speed. The lower gearing makes the 125 accelerate faster than the 150. The gearbox was later used for the sporty DL/GP125 and 200 models. Towards the end of the production run, the engine was further revamped and in this version was then used in the DL 125. Both the engine cover and the clutch of the DL were already used here as well as the rivetless rear sprocket.

At about the same time the white switches were beung replaced by black items, the clip-on panels are introduced, the toolbox is now made from grey plastic and the old horncasting badge is replaced by the new rectangular version. The seat however was covered blue throughout the whole production period.

Production period:
Production code:
1st frame no.:
LiS 150
125 cc


Li 150 Special – 1st version
(September 1963 until mid 1964)

Side-panel buffer made entirely from rubber


Li 150 Special – 2nd version
(mid 1964 until May 1965)

Side-panel buffer with clip


Li 150 Special – 3rd version
(May until September 1965)

'Silver' and 'Golden' badges are being introduced in addition to the 'Special' badge on the legshields


Li 150 Special – 4th version
(September 1965 until October 1966)

The chrome ring under the headset is discontinued, side panel locking handles are simplified


Original paint (Lechler)

Grigio Met.
Oro Chiaro Met.
Vehicle (general)
name: LI 150 Special (LIS 150)
year of manufacture: 1963, 1964, 1965, 1966
no. of exemplars produced: 69529
colours: grigio met (8060), oro chiaro met (8063)
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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