Technical Data

Geschrieben am 09.02.2008, zuletzt geändert am 10.10.2019
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Also see Brochures and My T5.

General Data

Type: Vespa PX125 T5
Manufactured: 1985 to 1990
VIN with elestart: VNX5T, ca. 1101 to 37161
VIN without elestart: VNX5T, ca. 3000001 to 3006631
Ignition: Electronic
Spark plug: Bosch W4C/W3C, Champion N-2C according to user’s manual
Top speed: 62mph
Gearing: 4-speed – constant mesh, hand-shifted
Gear oil: SAE 30
Dynamo: 12V/90W (PX only 80W)
Battery: Depending on country/equipment
Elestart: Depending on country/equipment
Front light: 12V, 45/40W (VW Beetle bulb)
Rims: 2-part, 2.10″ wide, 10″ diameter
Tyres: 3.50-10 Reinforced
Length: 1760mm
Width: 730mm
Heigth: 1170mm
Fuel tank: 8l incl. ~2l Reserve
Oil tank (with autolube): 1.5l
Fuel consumption: 3.5l/100 km (according to DIN 70030)
Lubrication (with autolube): 1:50
Dry weight: 108kg
Max. weight: 290kg


Not officially imported into the US; only „Lusso“ model with reinforced tires as standard, indicator beeper.


Transfer ports: 5 „luci di travaso“ (hence „T5“)
Bore x stroke: 55mm x 52mm (123.5cm³)
Piston pin: 16mm Ø; 47mm length Piston pin clips: C-form with „ears“, rectangular profile
Compression: 11.3:1
Power: 9kW/12BHP at 6700rpm; torque 1.34kgm at 6250 U/min
Gear: Clutch 20 teeth, primary gear 68 teeth Primary shaft to rear axle

  • First Gear: 12:58
  • Second Gear: 13:42
  • Third Gear: 17:38
  • Fourth Gear: 21:36 (36 teeth = „Short 4th gear“ for PX200 which has 35 teeth here)

Ignition: 16° BTDC
Carburator: Dell´Orto SI24/24G (Shorter airflow than the „E“ version in PX/PE models)

  • Main jet calibrator 120
  • Mixer tube BE4
  • Main jet 112 (110 with autolube)
  • Slow running jet with air enlarged filter hole(s): 100/100
  • Slow running jet with standard air filter hole: 50/100 (default)
  • Starter jet: 60
  • Idle mixture screw PX (SI20E/H; SI24E/H): Tip 0.65mm
  • Idle mixture screw T5 (SI24G): Tip 1.5mm

Handle bar

Square head light, flyscreen, digital or (rare) analog tachometer and speedometer up to 130km/h, fuel level indicator

Front fender

Lower egdes slightly higher than on PX models, made of one piece (PX fender is made of two pieces)


Sheet metal welded on, approx. 2″ longer and steeper than PX


Slight hump, also approx. 2″ longer than PX


„T5“ alloy emblem on both side cowls


Small tray with sticker „Pole Position“


Silencing plastic housing around gearbox


Different grid, different form. Horn mounted to lower steering bearing

Rear brake

Easy adjustable rear brake like on later PX models

Front suspension

20mm axle like on later PX models

Turn signal beeper

On all models…

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