First 10 models of the "Gran Sport" were produced at the end of 1954, all of these were destinated to exportation. It's only in 1955 that it will be offered in Italy. It will be also knows as "Vespone" (big wasp). It was the first sportive vespa and it will rapidly be the best seller of the brand. The 150cc motor will be introduced during 1954 with a 4 speed manual transmission, a dual seat (able to carry 2 persons). It will also use for the first time 10 inches diameter wheels. With all of theses improvements, The GS model will be able to reach a top speed of 100 km/h. A bulbed legshield on GS will also help to reduce the wind drag.
Note that this model will never be made in France by A.C.M.A because of a presumed failures prone of the GS model. They made a GL "Grand Luxe" to replace the GS, but finally, GS model will be imported in France soon after.
In 1961, the last 150 GS (VS5) model was fitted with the same tail-light of the 160 GS model.
Last 150 GS models produced were fitted with control cables hidden in the handlebar instead of outside cables on late models.
Founded in 1955, produced in 5 series until 1961. Motoristicamente inspired by the very first sports scooter Piaggio, Vespa 6 Days, The GS (Gran Sport) is an attempt to make the scooter Pontedera competitive with small light motorcycles period, reaching 100 km / h. The engine compared to contemporary versions on the GS is powered and carburetor directly plugged into the cylinder, the body is tapered for better air penetration. The first model (VS1) is distinguished from other Subsequent to having cables that pass outside of the handlebar.

Vespa 150gs - Series description

VS1T  1955-1955 (#1 series - MK1)

VS2T-VS3T  1956-1957 (#2 series - MK2)

VS4T  1958-1958 (#2 series - MK2)

VS5T  1958-1961 (#3 series - MK3)

Last Wideframe vespa

Vespa 150gs - Technical specification

Frame type Rim Gears speed km/h Specification

VS1T  1955-1955 (#1 series - MK1)

VS1M

wideframe 10" 4 gears 100 km/h

ENGINE: 2-stroke 145.6 cc Bore: 57mm. STROKE: 57 mm. POWER: 8 hp at 7500 rpm SAFC: 7:1 TRANSMISSION: 4 Speed, 3-disc clutch trimmed POWER: Ported the cylinder Piston, Dell'orto UB23S3 with air filter WHEELS: 3.50 × 10 SUSPENSION: coil spring conical flexibility and variable Double acting hydraulic shock absorber sull, coil spring coaxial biconical variable flexibility to the rear hydraulic shock BRAKES: drum front (ventilated by 59), rear drum (ventilated by 59) ELECTRIC SYSTEM: Joint 6v AC and DC 6V (6V battery - 12 Ah) AT external coil, alternator and rectifier 32 W LIGHT FRONT: diameter 115 light, lamp biluce 6V - 25/25W Position + lamp 6v - 3W) REAR LIGHT: 6v - 5W (+ 6V - 10W models with brake light) COLOUR: Grey metallic (Code Max Meyer 15005M) RUST: Red Opaque Fund (Max Meyer Code 10055M) TANK: 12 liters including reserve. SPEED: 101 km / h FRAME: VS1T from 001,001 to 0013,300 (year 1955)

VS2T-VS3T  1956-1957 (#2 series - MK2)

VS2M-VS3M

wideframe 10" 4 gears 100 km/h

engine: single cylinder, air cooled 2-stroke barrel: 2 transfer ports induction: piston ported bore: 57 mm stroke: 57 mm cubic capacity: 145.6 cc bhp at rpm: 8 @ 7500 compression ratio: 6.7: 1 carburetor: Dell'Orto UB 23 S3 transmission: 4 speed constant mesh 1st gear: 14.72: 1 2nd gear: 10.28: 1 3rd gear: 7.61: 1 4th gear: 5.84: 1 clutch: wet - multiplate lubrication: 6% carburetor: Dell'Orto UB 23 S3 main jet: 103 mixer: 2.60 needle position: 3 slow running jet: 45 ignition: contact breaker & coil ignition timing: 31 degrees BTDC breaker gap: 0.4 mm voltage: 6 volt max stator output: 6v - 32w wheels: 10" wheel hubs: pressed steel tires: 3.50 x 10 tire pressure (front): 16 psi tire pressure (rear solo): 20 psi tire pressure (rear w/passenger): 32 psi

VS4T  1958-1958 (#2 series - MK2)

VS4M

wideframe 10" 4 gears 100 km/h

VS5T  1958-1961 (#3 series - MK3)

VS5M

wideframe 10" 4 gears 100 km/h

Price 205,000 Pounds Production 80,000 copies Colors metallic aluminum gray Frame numbers VS5T 47351-127350 Engine Cylinders / time 2-stroke single cylinder Displacement 146.5 cc Bore and stroke 57 X 57 mm Compression ratio 6.7 :: 1 Power / RPM 8 hp / 7500 rpm Torque / revs nd Cooling Forced air Distribution Piston plate 2 transfers Supply UB23 S3 carburettor orchard Mixture 6% Ignition Flywheel Magnet Start Crank Clutch Multiple disc in oil bath Change 4-speed knob Cycling Frame Monocoque Front suspension Pull rod wheel with coil spring and shock absorber Rear Suspension Coil spring and shock absorber Final Drive Direct Wheels Cantilever interchangeable with disk decomposable Front brake Drum 150 mm Rear brake Drum 150 mm Tires 3.50 X 10 front and rear Dimensions and Weight Length 1170 mm Width 700 mm Seat height 800 mm Wheelbase 1180 mm Tank VS2-VS5 9.5 liters Weight 104 Kg Performance claims Speed ​​'maximum 100 Km / h acceleration nd consumption 3 liters / 100 km

Vespa 150gs - VIN numbers; VIN serial numbers; Chassis number

  VIN prefix Year VIN Chassis Number Vespas made  
VS1T #1 series - MK1
VS1T1955 1001 - 1330012 299
VS2T-VS3T #2 series - MK2
VS2T-VS3T1956 13301 - 2331010 009
VS2T-VS3T1957 23311 - 3531011 999
VS4T #2 series - MK2
VS4T1958 35311 - 4735012 039
VS5T #3 series - MK3
VS5T1958 47351 - 523635 012
VS5T1959 52364 - 7012817 764
VS5T1960 70129 - 10473134 602
VS5T1961 104732 - 12735022 618

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