Yamaha FS 80 SE (1981–1982) — Specs
Identity
Manufacturer: Yamaha
Model: FS 80 SE
Category: Motorcycle
Type: Motorcycle
Years: 1981 → 1982
Engine
Displacement (cc): 79
Cylinders: 1
Power (hp): 6.8
Power (kW): 5
Torque (Nm): 5
Dimensions
Overall length: 1830 mm
Overall width: 700 mm
Overall height: 1090 mm
Wheelbase: 1290 mm
Ground clearance: 115 mm
Weight (kg): 84
Tank (L): 9
Tires
Front pressure (bar): 1.8
Rear pressure (bar): 2.5
Drivetrain
Drive chain: 100 links
Sprockets (front / rear): 15 / 35
Ignition
Spark plug: NGK B7HS
Plug gap: 0.7 mm
Fluids & Filters
Oil filter: OEM oil filter
Air filter: OEM air filter
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~360 km on a full tank (9.0 L)
Service
Battery: OEM battery specification
Service interval (km): 3000
Service interval (months): 12
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 3,000 km or 12 months, whichever comes first. Spark plug: NGK B7HS (gap 0.7 mm). Chain: 100 links, sprockets 15/35 teeth. Tire pressure: front 1.8 bar, rear 2.5 bar (cold). 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
- Premium Motul 5100
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 |
- Standard Repsol Moto Racing 4T
- Standard Elf Moto 4 Tech
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 B7HS, gap 0.7 mm
- OEM NGK B7HS
- Premium NGK BR7HIX
- Standard NGK B7HS
Front brake pads
Rear brake pads
Drive chain
Spec: 100 links | Sprockets 15/35 teeth / 100 links
Front tire
Spec: 1.8 bar
Rear tire
Spec: 2.5 bar
Battery
- Premium Yuasa YTX5L-BS or YT4B-BS (typical 50-125cc)
Brake fluid
- Standard TotalEnergies HBF4
Coolant
Service interval
Spec: 3 000 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
- OEM 2-stroke engine — no valve check needed
Suspension
Spec: 151 ml 10W-30
- OEM Fork oil grade: 151 ml 10W-30
