Lambro 175

Italian Production Dates: 1963 - August 1965
Frame Prefix: M41

The Lambro 175 was launched in September 1963. They began from Chassis Number 499501. It is a culmination of the technical amendments made to the Lambretta Li 175 Series 2 although rebadged to bring it in line with the new Lambro 200 as they were marketed alongside each other as a range. Identifying features include the single headlight, non-suicide doors and 200cc stud spacing with a sleeved barrel.

The Chassis Prefix was changed from T41 to M41 previously to the badge change. Although we have yet to prove the exact date, we suspect it was in June 1963 with the launch of the M42 Lambro 200 and therefore there are cross over Lambros with the M41 chassis prefix.

Overall Dimensions

Maximum Length:	Open Body Type: 2770mm	Maximum height:	Cabin: 1620mm
	Closed Body Type: 2710mm		Open Body: 775mm
			Box Body: 1415mm
Maximum width :	1330mm
Ground Clearance:	120mm	Track width:	1180mm
Wheelbase:	1710mm

Frame and Cabin

Frame	Tubular Steel backbone with superstructures for the support of the cab and the body. Cradle for spare wheel
Front suspension:	by means of rocker arms connected to levers with end balls compressing through guide pistons two variable pitch helical springs.
	Possibility of application of the shock absorbers
Rear suspension:	with two longitudinal leaf springs anchored to the frame at the front and shackled at the rear
	Possibility of application of the shock absorbers
Cabin:	Pressed steel, rear window equipped with rear curtain, instrument panel, holes for attaching the door hinges, rear-view mirror.
Windscreen:	Curved glass windscreen with rubber beading.
Windscreen Wiper:	Windscreen wiper hand operated (an electrical windscreen wiper can be fitted in place)
Seat:	Double seat bench over engine cover
Doors:	Doors (accessory) complete with glass windows (left hand door with normal type lock, right hand door with locking device in handle).

Wheels and Brakes

Wheels	Interchangeable wheels	Tyres:	front: 4.00 x 8”
	Rims in pressed steel in two halves		rear: 4.00 x 8” T (T mark indicated heavy tread tyres for commercial use)
Brakes: Internal expansion brakes.	mechanically controlled by lever on the right handlebar for the front brake - foot operated hydraulic rear brakes	Tyre pressures at full load:	Front: 2 kg/cm square
	Hand lever parking brakes on rear wheels.		Rear: 3.5 kg/cm square

Rear Axle:

Consisting of:	central differential box:
	rear axle housing
	sliding half-shafts easily withdrawn by removal of wheel flange

Electrical Equipment

The 6-pin 80W flywheel alternator feeds the 12V - 18 Ah battery through the rectifier-regulator group

The charging circuit is protected by a fuse (15A) located on the wiring block on the crossbar under the seat. The user circuits are protected by 5 fuses (8A each), arranged below the dashboard.

The direction indicators flasher unit and the electrical wiper switch (accessory) are live only with the ignition switched on (ie key and switch on the dashboard in the positions 1,2,3)

The horn and rear stop lights can be operated without ignition key inserted.

The battery must be always regularly connected, otherwise engine start can be faulty and dangerous overloading of the circuits can occur during running.

The red indicator bulb on the dashboard comes on with the ignition on and stays on with the engine running. Should turn off when the ignition is switched off

Position	Use	Number	Features
Position	Use	Number	Electrical	Type of Bulb	Type of Fitting
Headlight	Dual Filament. Full beam/dipped	1	12V-25 / 25W	Spherical	BA 20 d
Front Side Lights	Parking	2	12V-5/15W	Spherical	BAY 15d/19
	Front Indicators	2	12V-3W	Cylindrical	BA 9 s
Rear Side Lights	Parking and Stop	2	12V-5/15W	Spherical	BAY 15d/19
	Rear Indicators	2	12V-15W	Spherical	BA 15 s
Dashboard	Ignition	1	24V-3W	Festoon	S 7/8
	Indicators	1	12V-3W	Festoon	S 7/8
	Lights	1	12V-3W	Festoon	S 7/8
Speedometer (accessory)	Illumination of speedo	1	12V-3W	Cylindrical	BA 9 s

Engine

Engine:	Single cylinder two stoke, forced air cooled.	Carburettor	Dell’Orto MA 19 BS 7 – Cartridge type air filter
Bore:	62mm	Choke:	19
Stroke:	58mm	Max. Jet:	80
Capacity:	175cc	Pilot Jet:	40
Compression Ratio:	7	Starter Jet:	55
Output:	7 H.P. at 4750 R.P.M.	Atomizer	260 B
		Needle mounted on the middle notch	D 21

Ignition	flywheel alternator, battery, external HT coil. Fixed advance
Spark Plug:	during running in – 225 Bosch scale heat range
	after running-in – 225 – 240 Bosch scale heat range, according to conditions
Start:	Pedal / Kickstart (on the left of the engine)
Clutch:	Multi-disc type in oil bath
Gear Box:	gearbox with four speeds and reverse constant mesh gears ,alternately splined to the secondary shaft by coupling sliders
Total transmission ratios (Rear Wheel RPM/ENGINE RPM)	1st gear: 1/28.050
	2nd gear: 1/16.107
	3rd gear: 1/10.131
	4th gear: 1/6.875
	Reverse: 1/29.987
Transmission	From engine to gearbox: by gears with flexible coupling.
	From gearbox to rear axle: by hollow shaft with splined couplings and two flexible couplings

Performance

Dry Weight without accessories and doors.	Open Type Body 290kg	Useable height of body (box type)	840mm
	Box Type body 325kg	Maximum permissible total weight (dry weight + accessories & fuel + crew + load)	800kg
Useable length of Body	Open Type Body 1330mm	Max. pay load	Open Body: 400kg
	Box Type body 1180mm		Closed Body: 380kg
Useable width of body	Open Type Body 1230mm	Max Speed	Empty 38 mph (61km/h)
	Box Type body 1100mm		At full load 36 mph (58km/h)
Min. Turning Radius:	2565mm	Tank Capacity:	11.5 litres
		Range:	170 miles (275km)
Consumption (to CUNA rules) at full load at 22m.p.h: 80m.p.g (3.5lit/100km)

Documents and Pictures


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NOTE: Technical specifications have been taken directly from Innocenti documentation eg User Manuals for each model. Later workshop manuals and amendments made after the publication of each manual may mean that these details appear differently in other documentation and may be different for your particular model.

Sources:
Lambro 175 Uso e manutenzione Prop/IT 1.64