Honda ST 50 DAX (1988–1999) — Specs
Identity
Manufacturer: Honda
Model: ST 50 DAX
Category: Motorcycle
Type: Motorcycle
Years: 1988 → 1999
Engine
Displacement (cc): 49
Cylinders: 1
Power (hp): 2.4
Power (kW): 1.8
Torque (Nm): 11
Dimensions
Overall length: 1830 mm
Overall width: 700 mm
Overall height: 1090 mm
Wheelbase: 1290 mm
Ground clearance: 115 mm
Weight (kg): 75
Tank (L): 3.5
Tires
Front pressure (bar): 1.3
Rear pressure (bar): 1.8
Drivetrain
Drive chain: 98 links
Sprockets (front / rear): 14 / 41
Ignition
Spark plug: NGK CR6HSA
Plug gap: 0.6-0.7 mm
Fluids & Filters
Engine oil: SAE10W-40
Engine oil (with filter, L): 0.8
Engine oil (without filter, L): 0.6
Oil filter: Hiflofiltro HF111
Air filter: Hiflofiltro HFA1209
Fuel consumption
Estimated range: ~140 km on a full tank (3.5 L)
Service
Battery: YTX4L-BS
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 mm, exhaust cold 0.05 mm. Engine oil: oil grade SAE10W-40, 0.8 L with filter change, 0.6 L without filter change. Spark plug: NGK CR6HSA (gap 0.6-0.7 mm). Chain: 98 links, sprockets 14/41 teeth. Tire pressure: front 1.3 bar, rear 1.8 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, 0.8 L (with filter), 0.6 L (without filter)
- OEM OEM recommended engine oil (SAE 10W-40)
- 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
Spec: Hiflofiltro HF111
- Premium Hiflofiltro HF111
- Premium K&N KN-111
Air filter
Spec: Hiflofiltro HFA1209
- Standard Hiflofiltro HFA1209
Spark plug
Spec: NGK CR6HSA, gap 0.6-0.7 mm
- OEM NGK CR6HSA
- Premium NGK CR6HSAIX
- Standard NGK CR6HSA
Front brake pads
Rear brake pads
Drive chain
Spec: 98 links | Sprockets 14/41 teeth / 98 links
Front tire
Spec: 1.3 bar
Rear tire
Spec: 1.8 bar
Battery
- Premium Yuasa YTX5L-BS or YT4B-BS (typical 50-125cc)
Brake fluid
- 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 mm
- OEM Exhaust clearance: cold 0.05 mm
Suspension
Spec: telescopic fork / 55 ml
- OEM Fork: telescopic fork
- OEM Fork oil grade: 55 ml
