Kymco AK 550I (EURO 4/5) (2017–2023) — Specs
Identity
Manufacturer: Kymco
Model: AK 550I (EURO 4/5)
Category: Scooter
Type: Scooter
Years: 2017 → 2023
Engine
Displacement (cc): 550
Cylinders: 2
Power (hp): 51
Power (kW): 38
Torque (Nm): 52
Dimensions
Overall length: 2185 mm
Overall width: 800 mm
Overall height: 1250 mm
Wheelbase: 1580 mm
Ground clearance: 130 mm
Weight (kg): 230
Seat height (mm): 785
Tank (L): 14.5
Tires
Front tire: 120/70 R15
Rear tire: 160/60 R15
Front pressure (bar): 2.2
Rear pressure (bar): 2.4
Ignition
Spark plug: NGK CR7E
Plug gap: 0.6-0.7 mm
Fluids & Filters
Engine oil: SAE5W-50, API SJ
Engine oil (with filter, L): 2.7
Engine oil (without filter, L): 2.6
Oil filter: Hiflofiltro HF164
Air filter: Hiflofiltro HFA5118
Coolant (L): 1.5
Brake fluid: DOT 4
Fuel consumption
Estimated: 4.5 L/100 km
Estimated range: ~322 km on a full tank (14.5 L)
Note: real-world ±15-30% depending on riding style
Service
Battery: YTX12-BS
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 18000
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 18,000 km. Engine oil: oil grade SAE5W-50, API SJ, 2.7 L with filter change, 2.6 L without filter change. Spark plug: NGK CR7E (gap 0.6-0.7 mm). Brake fluid: DOT 4. Coolant capacity: 1.5 L. Tire pressure: front 2.2 bar, rear 2.4 bar (cold). Tire size: front 120/70 R15, rear 160/60 R15. 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: SAE5W-50, API SJ, 2.7 L (with filter), 2.6 L (without filter)
- OEM OEM recommended engine oil (SAE 5W-50)
- 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 HF164
- Premium Hiflofiltro HF164
- Premium K&N KN-164
Air filter
Spec: Hiflofiltro HFA5118
- Standard Hiflofiltro HFA5118
Spark plug
Spec: NGK CR7E, gap 0.6-0.7 mm
- OEM NGK CR7E
- Premium NGK CR7EIX
- Standard NGK CR7E
Front brake pads
Spec: OEM front pad (EBC equivalent: SFA266HH)
- Premium EBC SFA266HH
- Standard EBC SFA266 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: SFA193HH)
- Premium EBC SFA193HH
- Standard EBC SFA193 (organic)
Front tire
Spec: 120/70 R15, 2.2 bar
- OEM OEM 120/70 R15
Rear tire
Spec: 160/60 R15, 2.4 bar
- OEM OEM 160/60 R15
Battery
Spec: OEM battery: Yuasa YTX12-BS
- Premium Yuasa YTZ12S
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Spec: 1.50 L coolant capacity
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: 18 000 km
Suspension
Spec: 41 mm USD fork
- OEM Fork: 41 mm USD fork
