Vespa ET3 PRIMAVERA (1976–1990) — Specs
Identity
Manufacturer: Vespa
Model: ET3 PRIMAVERA
Category: Scooter
Type: Scooter
Years: 1976 → 1990
Engine
Displacement (cc): 121
Cylinders: 1
Power (hp): 7
Power (kW): 5
Torque (Nm): 9
Dimensions
Overall length: 1900 mm
Overall width: 730 mm
Overall height: 1170 mm
Wheelbase: 1335 mm
Ground clearance: 125 mm
Weight (kg): 78
Tank (L): 5.6
Tires
Front tire: 110/70 R12
Rear tire: 120/70 R12
Ignition
Spark plug: NGK BR7HS
Plug gap: 0.6 mm
Fluids & Filters
Oil filter: OEM oil filter
Air filter: OEM air filter
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~223 km on a full tank (5.6 L)
Service
Battery: OEM battery specification
Service interval (km): 10000
Service interval (months): 12
Valve check (km): 20000
Parts and consumables for this motorcycle
Data is gathered with care, but without guarantee. Always confirm critical information with your dealer or workshop.
Service notes
Service interval: every 10,000 km or 12 months, whichever comes first. Valve clearance check every 20,000 km. Spark plug: NGK BR7HS (gap 0.6 mm). Tire size: front 110/70 R12, rear 120/70 R12. Always confirm critical values with the workshop manual or an authorised dealer.
OEM and quality aftermarket parts that fit this bike. Always confirm with your dealer before ordering.
Engine oil
- OEM OEM recommended engine oil
- Premium Motul 7100 4T (100% Synthetic, Ester)
- Premium Motul 5100 4T Technosynthese (Semi-Synthetic)
Which Motul for this bike?
| Motul 7100 4T ✓ | Motul 5100 4T | |
|---|---|---|
| Product | Motul 7100 4T — 100% fully synthetic | Motul 5100 4T — semi-synthetic |
| Best for | Sport, Naked, Adventure (600cc+), track | Standard, Cruiser, Scooter, daily use |
| RPM protection | Excellent — ester base, stable under load | Good — for normal riding conditions |
- Premium Liqui Moly Motorbike 4T
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
- Standard TotalEnergies Quartz Moto 4T
Fully Synthetic vs Semi-Synthetic
| Fully Synthetic | Semi-Synthetic | |
|---|---|---|
| Base oil | 100% chemical synthesis (ester or PAO) | Mineral oil + synthetic additives |
| Heat resistance | Excellent — stable at extreme heat & RPM | Good — suitable for normal temperatures |
| Cold start | Better — reaches engine faster when cold | Good — adequate for normal climates |
| Change interval | Longer (up to 10,000 km) | Shorter (5,000–7,000 km typical) |
| Price | Higher | Lower |
Oil filter
Air filter
Spark plug
Spec: NGK BR7HS, gap 0.6 mm
- OEM NGK BR7HS
- Premium NGK BR7HIX
- Standard NGK BR7HS
Front brake pads
Spec: EBC SFA353HH
- Premium EBC SFA353HH
Rear brake pads
Spec: EBC SFA353HH
- Premium EBC SFA353HH
Front tire
Spec: 110/70 R12
- OEM OEM 110/70 R12
Rear tire
Spec: 120/70 R12
- OEM OEM 120/70 R12
Battery
- Premium Yuasa YTX5L-BS or YT4B-BS (typical 50-125cc)
Brake fluid
- Standard TotalEnergies HBF4
Coolant
Service interval
Spec: 10 000 km / 12 months
- OEM Engine oil + oil filter change
- OEM Air filter inspection
- OEM Spark plug check
- OEM Brake fluid replacement: every 2 years
Valve check
Spec: 20 000 km
- OEM 2-stroke engine — no valve check needed
