Lambretta 150D & LD Instruction Manual
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^ A" " ^ * -a '• > • •m»:,;> ;• .. V:- >-• -u . • Instruction : v; ;: ' J ' , * 1 -?•-. • * vV... OLDTIMERWORKSHOP.COM, ,'*. IIVI PORTA IMT—LUBRICATION MODELS D and LP ENGINE. Thoroughly mix \ pint of oil with each gallon of petrol before filling the tank. After standing over-night, and particularly for longer periods, the machine should be rocked to re-mix any separation of the oil and petrol mixture which may have occurred. Use one of the following grades :— MOBILOIL A or MOBILMIX TT, CASTROL TWO-STROKE OIL or CASTROL XL, ENERGOL SAE 30, SHELL X-100 30, ESSOLUBE 30. GEARBOX. For the first 1000 miles it is recommended that the box be emptied and refilled (J-pint) every 500 miles. Thereafter drain and refill every 1000 miles. For U.K. winter and cold climates use one of the engine oils mentioned above. For U.K. summer and warm climates use one of the following:— MOBILOIL BB, CASTROL XXL, ENERGOL SAE 40, SHELL X-100 40, ESSOLUBE 40. TRANSMISSION CASE, (see page 18). Keep filled to correct level with one of the following grades:— MOBILUBE GX 140, CASTROL HI-PRESS, ENERGOL EP SAE 140, SHELL SPIRAX 140 EP, ESSO EXPEE COMPOUND 140. FRAME GREASING. Lubricate with one of the following greases :— MOBILGREASE No. 5, CASTROLEASE CL, ENERGREASE AO, SHELL RETINAX A or CD, ESSO GREASE. Certain of the Oil Companies whose lubricants are recommended provide dispensing equipment which ensures the use of a petrol/oil mixture for two-stroke engines in the correct proportions. Service by means of such equipment is approved by us. OLDTIMERWORKSHOP.COM INTRODUCTION || M m ere you are now in possession of the new Lam- mechanical organ needs care. The first thing is to con bretta, which will give you indisputable proof of the sider its moving elements and their method of work qualities you expect to find. ing; learn further all the possibilities of your Lam I In effect it has been expressely designed to meet bretta and treat it sensibly. It always pays to be your requirements whether you think of using it gentle with a new engine so that it turns over sweetly ; for business or for pleasure purposes. by this way you will keep its essential specifications unaltered. The Lambretta is still available in a dual version: the de luxe model, named LD/150, with side panels, You will find here, briefly summarized, some funda and the standard model, named D/150, without mental hints and instructions needed by the user to covering. avoid inconveniences and mistakes. Do not neglect A great deal of research and experiment on the part to read this booklet and follow our suggestions: you of our technical staff, customer requirements and pre will be well-rewarded by keeping your machine at 4 sent-day traffic conditions decided the INNOCENTI its full efficiency even after long use. Works to design and manufacture a new sturdy motor We feel grateful for your choice: it will be a pleasure 3 scooter, having a cubic capacity of 150 cm . to count you from now on among our affectionate Before using your new machine remember that each Lambretta-riders. 3 OLDTIMERWORKSHOP.COM instruction Manual OLDTIMERWORKSHOP.COM Light switch with ground and horn button Light switch Gear indicator with ground and horn button Gear indicator Clutch lever Throttle Clutch lever Gear control twistgrip Throttle lever Front brake Gear control twistgrip Front brake lever Tank filler cap Key safety-lock Fuel tap Headlight Tank filler cap \\i- Headlig Air cleaner Fuel tap Vi ,\ Shock absorber Number plate Tail light carrier Number plate carrier Rear brake pedal Raar brake pedal expansion chamber ' K. S. pedal Speed change connecting casing K. S. pedal Fig. 2 Fig. 1 6 7 OLDTIMERWORKSHOP.COM MAIN FEATURES Vehicle Engine Dell'Orto MA 19B4 carburettor in corporating : Mod. d Mod. Id 2-stroke single cylinder engine — starter device Overall 70" 70" Capacity 148 cc. length . ( 1,770 m) (1,770 m ) — petrol filter Bore 2,244" (57 mm) Overall 38" 38" — silencing air cleaner height . (0,960 m) (0,960 m) Stroke 2,283" (58 mm) Choke 0.748" (19 mm); max jet Ground 4-3/8" 4-3/8" Compression ratio 6,5 0.0283" (72/100 mm) clearance . I (0,110 m) (0,110 m) HP output max 6 Width( Hand1- 29" 29" Ignition by flywheel magneto and r. p. m. 4750 lebar) (0,740 m) (0,740 m) outside high tension coil - Ad vance setting when standing - Wheelbase . 50-1/2" 50-1/2" Cylinder of high quality wear-re 4-pole magneto (28 Watt). (1,281 m) (1,281 m) sistant cast iron Unloaded 165 lbs Side-located spark plug. Heat ran 194 lbs Cylinder head of light alloy, die weight . ge: 240 Bosch Scale (KLGF 80- (75 kg) (88 kg) cast Max speed .... 47-50 m.p.h. Champion L 1 IS Lodge H.H. 14). Cast piston of light alloy, wear re (75-80 km/h) Starting by pedal. Fuel consumption 140 m.p.g. sistant Forced draught cooling by fan fitt at normal speed Connecting rod of high-tensile ed on the flywheel. steel with needle bearings on big end Uphill : Clutch Built-up crankshalft carried in ball low gear 35 % gear ratio 1 :12,9 and roller bearings Multi-plate type running in oil I bath; operated by lever on the left second gear 20 % gear ratio 1 : 7,5 Lubrication by petroil (gas and oil twistgrip. Adjusting device, just top gear 10 % gear ratio 1 :4,75 mixture) near the lever (fig. 1-2). 9 OLDTIMERWORKSHOP.COM Gearbox Suspension sion bar angle when the load in for the front tyre 22 25 Ibs/s.i. creases. 3-speed. Constant mesh gears in The fitting of a hydraulic damper for the rear tyre with pillion rider. oil bath made of high-tensile steel. The front suspension (fig. 3) is rea remarkably increases springing lised by means of trailing links. Tank Hand control by left twistgrip and comfort. Each trailing link is connected to a flexible cable (fig. 1-2). Gear posi The return lever knuckles and the Fuel capacity: lever bearing an end ball which tion indicator near the twistgrip. torsion bar are properly protected Model d = 1,4 gals (6,3 It) in compresses a progressive type and lubricated by means of grease cluding ll/< pt. (0,7 It) reserve spring, located inside the fork tu guns (D). Transmission bes (A). This group is hermetical ly protected against water and dust I From engine to gearbox by bevel and operates in the grease enclos lilts' gears; from gearbox to the rear ed within the boxes (B) the result bevel gears by torsion shaft espe being longer working life and no cially efficient against sudden va maintenance. The rear suspension riations of the revolution rate. Be (fig. 4) is designed with a long vel gears running in oil bath. The swinging arm, consisting of the shaft is enclosed in the transmis transmission case A (fig. 10), and sion case A (fig. 10). The connec pivoting on a robust pin (B) in tion for the speedometer drive is corporated in the frame. to be found under the cap B (fig. Through its movement the swing 10) on the transmission case. ing arm loads the suitably support ed torsion bar made of high-tensile Brakes Wheels steel. The swings of the engine Frame Internal expanding type brakes Interchangeable. The rear wheel is group are transmitted to the tor with flexible control, operated by detachable like motor car wheels The frame is of a large steel tube sion bar by means of return levers hand on the front wheel and by Easy dismantling of the pressed section ensuring highest rigidity (C), which are properly propor pedal on the rear wheel. (See ad steel sheet rims. 4.00-8" tyres. In and eliminating vibration. tioned in order to reduce the tor justing device pag. 21 ). flating pressure: 14 -h 16 Ibs/s.i. Fig. 5 10 11 OLDTIMERWORKSHOP.COM WIRING DIAGRAM Model Id = 1,55 gals (7,1 It) in plate located into the head lamp. On the model d the tool box is cluding 11 ji pt. (0,7 It) reserve (See Wiring Diagram). placed under the pillion seat; on Switch lever position 3-way tap (See fig. 5-6) Note: In such a case, the tail lamp the model Id it is located under M - Engine stop (earthing) C = close — A = open bulb must be replaced with a 6V- the covering, readily accessible by 0 - Off R = reserve. 3W one. dismantling the right side panel. 1 - Pilot light 2 - Dipped beam Electrical System Tool Kit Accessories 3 - Main beam By flywheel magneto. Headlight 1 Double tubular spanner (21-14 Mod. d : pillion seat, luggage box, with twin-filament bulb 6V-25/25W mm = 0.827" — 0.551") for spare wheel, footrests for pillion and 12V - 10 W pilot lamp. Tail spark plug and wheel nuts. rider. (Optional-extras). light with red gem (6V - 5W). 1 Double spanner (14 mm = Mod. Id: pillion seat and spare Lighting switch, on the right hand 0.551") and for rear wheel hub wheel. (Optional-extras). lebar, of lever type; the lever ser nut All accessories can be supplied with ves to earth the engine as well. 1 Double spanner (10-14 mm the necessary supports and fittings. Horn push button coupled with the = 0.394" — 0.551") for cap switch. screws of hexagon socket type Safety-lock If an illuminated speedometer is 1 Double spanner (8-10 mm = fitted, the 6V - 1,5 W bulb socket 0.315" — 0.394") Both models are provided with is to be derived from the terminal 1 Screwdriver key safety-lock.