Yamaha BL 125 BELUGA (1985–1989) — Specs
Identity
Manufacturer: Yamaha
Model: BL 125 BELUGA
Category: Scooter
Type: Scooter
Years: 1985 → 1989
Engine
Displacement (cc): 123
Cylinders: 1
Power (hp): 9.5
Power (kW): 7
Torque (Nm): 9
Dimensions
Overall length: 1900 mm
Overall width: 730 mm
Overall height: 1170 mm
Wheelbase: 1335 mm
Ground clearance: 125 mm
Tires
Front tire: 100/80-14
Rear tire: 120/70-14
Front pressure (bar): 1.4
Rear pressure (bar): 2.2
Ignition
Spark plug: NGK BPR8HS
Plug gap: 0.7 mm
Fluids & Filters
Oil filter: OEM oil filter
Air filter: OEM air filter
Brake fluid: DOT 4
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 BPR8HS (gap 0.7 mm). Brake fluid: DOT 4. Tire pressure: front 1.4 bar, rear 2.2 bar (cold). Tire size: front 100/80-14, rear 120/70-14. 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 BPR8HS, gap 0.7 mm
- OEM NGK BPR8HS
- Premium NGK BPR8HIX
- Standard NGK BPR8HS
Front brake pads
Rear brake pads
Front tire
Spec: 100/80-14, 1.4 bar
- OEM OEM 100/80-14
Rear tire
Spec: 120/70-14, 2.2 bar
- OEM OEM 120/70-14
Battery
- Premium Yuasa YTX5L-BS or YT4B-BS (typical 50-125cc)
Brake fluid
Spec: DOT 4
- 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
