Oil and filter change
≈ 10,000 km or 1 year
JASO MA or MA2 approved four-stroke motorcycle oil (JASO MB on scooters): an “energy conserving” car oil makes the wet clutch slip. Change it more often in city use or on track.
Source [1]GTS (2005) · 2007–2018
Vespa GTS (2005) 125 · 15 hp (2007 to 2018)
The Vespa GTS (2005) 125 uses the Piaggio 125 Leader petrol engine with 15 hp.
Choose an engine
Identify the car and prepare its maintenance
Download the service plan (PDF)
Compare with another version
Technical specifications
- Fuel
- Petrol
- Power
- 15 PS / 11 kW
- Displacement
- 124 cm³
- Cylinders
- 1
- Engine code
- Piaggio 125 Leader
- Period covered
- 2007–2018
- Documented market
- Europe
Transmission
- Automatic variator (CVT)
Figures apply to the cited configuration and market; equipment and transmissions may vary by production date.
Specification source : [1] AutoKarnet
This version
15 hp (11 kW), variator transmission, automatic variator (CVT). Built from 2007 to 2018.
AutoKarnet advice
In the range
It is the entry-level petrol version of this generation. The Piaggio 125 Leader engine is also fitted to: Vespa LX (LX 125).
AutoKarnet advice
Body style and inspection points
On a scooter, have the variator belt and rollers checked when due, even if the scooter covers little distance in town. Also check the small-diameter tyres, which wear fast, the lights and the centre stand; a slipping belt is felt when pulling away.
AutoKarnet advice
Distinguishing similar versions
Among the GTS (2005) pages, the 300 22 hp offers a comparison: 22 hp (16 kW), Piaggio 278 Quasar, 278 cm³, automatic variator (CVT), 2008–2018. The version on this page has 15 hp (11 kW), Piaggio 125 Leader, 124 cm³, automatic variator (CVT), 2007–2018. When requesting a quote, specify the output and gearbox; the marketing name alone does not identify the correct parts.
AutoKarnet advice
Maintenance and records
≈: estimated reference — the vehicle’s service indicator prevails.
Brake fluid
Every 2 years
Replace the fluid in both circuits (and the hydraulic clutch if fitted), whatever the mileage; dark fluid has absorbed moisture.
Source [1]Fork oil
≈ 30,000 km
Fork oil change and seal check; an oil film on the tubes means a seal needs replacing before it contaminates the brake caliper.
Source [1]Final drive oil
≈ 20,000 km
The rear-wheel gearcase has its own oil, separate from the engine oil; replace it when the service book says, often with the variator belt.
Source [1]Spark plugs
Every 10,000 km
Replace the full set; worn plugs raise consumption and cause misfires.
Source [1]Air filter
Every 10,000 km
Replace more often in dusty conditions.
Source [1]Valve clearance
Every 10,000 km
Check and adjust if needed, often together with the plugs; too little clearance burns the valves, too much makes the engine noisy.
Source [1]Variator belt and rollers
Every 20,000 km
Replace the belt and check the rollers and clutch; a worn belt makes the scooter slip and can snap while riding.
Source [1]Coolant
Every 3 years
Replace the coolant and check the hoses and radiator; check the level cold between services.
Source [1]Questions about this version (3)
Which engine is in the Vespa GTS (2005) 125?
The Piaggio 125 Leader petrol engine (124 cc), 15 hp (11 kW).
AutoKarnet advice
Which oil for the Vespa GTS 125?
A JASO MA2 10W-40 four-stroke motorcycle oil suited to the Piaggio 125 Leader engine.
AutoKarnet advice
How do I check this page matches my car?
This page covers Vespa GTS (2005) 125 15 hp, scooter, 2007–2018, with 15 hp (11 kW), Piaggio 125 Leader, 124 cm³, automatic variator (CVT), 2007–2018. Compare these details with the registration document and gearbox identification. The designation Piaggio 125 Leader may cover several revisions: a VIN is still needed to confirm part numbers.
AutoKarnet advice
Documentary sources
- [1] Rédaction AutoKarnet
AutoKarnet · FR · Europe · Synthèse éditoriale AutoKarnet · Accessed 09/10/2026