Yamaha TW 125 (1999) — Specs
Identity
Manufacturer: Yamaha
Model: TW 125
Category: Motorcycle
Type: Motorcycle
Years: 1999 →
Engine
Displacement (cc): 125
Cylinders: 1
Power (hp): 12
Power (kW): 8.7
Dimensions
Overall length: 1950 mm
Overall width: 720 mm
Overall height: 1110 mm
Wheelbase: 1340 mm
Ground clearance: 150 mm
Weight (kg): 125
Seat height (mm): 805
Tank (L): 7
Tires
Front pressure (bar): 1.5
Rear pressure (bar): 1.5
Drivetrain
Drive chain: 420 chain, 109 links
Sprockets (front / rear): 14 / 50
Ignition
Spark plug: NGK DR8EA
Plug gap: 0.6 mm
Fluids & Filters
Engine oil: SAE10W-40, API SE
Engine oil (with filter, L): 1.1
Engine oil (without filter, L): 1
Oil filter: Hiflofiltro HF143
Air filter: Hiflofiltro HFA4102
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~233 km on a full tank (7.0 L)
Service
Battery: OEM battery specification
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 12000
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 6,000 km or 12 months, whichever comes first. Valve clearance check every 12,000 km. Valve clearance — intake cold 0.05-0.09 mm, exhaust cold 0.11-0.15 mm. Engine oil: oil grade SAE10W-40, API SE, 1.1 L with filter change, 1 L without filter change. Spark plug: NGK DR8EA (gap 0.6 mm). Brake fluid: DOT 4. Chain: 109 links, sprockets 14/50 teeth. Tire pressure: front 1.5 bar, rear 1.5 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
Spec: SAE10W-40, API SE, 1.1 L (with filter), 1.0 L (without filter)
- OEM OEM recommended engine oil (SAE 10W-40)
- 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 |
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
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
Spec: Hiflofiltro HF143
- Premium Hiflofiltro HF143
- Premium K&N KN-143
Air filter
Spec: Hiflofiltro HFA4102
- Standard Hiflofiltro HFA4102
Spark plug
Spec: NGK DR8EA, gap 0.6 mm
- OEM NGK DR8EA
- Premium NGK DR8EIX
- Standard NGK DR8EA
Front brake pads
Spec: EBC FA275HH
- Premium EBC FA275HH
Rear brake pads
Spec: EBC FA275HH
- Premium EBC FA275HH
Drive chain
Spec: 109 links | Sprockets 14 / 50 teeth / 109 links
Front tire
Spec: 1.5 bar
Rear tire
Spec: 1.5 bar
Battery
- Premium Yuasa YTX7L-BS or YTX7A-BS (typical 125-250cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Service interval
Spec: 6 000 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: 12 000 km
- OEM Intake clearance: cold 0.05-0.09 mm
- OEM Exhaust clearance: cold 0.11-0.15 mm
Suspension
Spec: 243 ml SAE 10W
- OEM Fork oil grade: 243 ml SAE 10W
