CFMOTO 650 NK (EURO 4) (2017–2020) — Specs
Identity
Manufacturer: CFMOTO
Model: 650 NK (EURO 4)
Category: Naked
Type: Motorcycle
Years: 2017 → 2020
Engine
Displacement (cc): 649
Cylinders: 2
Power (hp): 61
Power (kW): 45
Torque (Nm): 56
Dimensions
Overall length: 2090 mm
Overall width: 790 mm
Overall height: 1085 mm
Wheelbase: 1430 mm
Ground clearance: 145 mm
Weight (kg): 203
Seat height (mm): 795
Tank (L): 17
Tires
Front tire: 120/70 ZR17
Rear tire: 160/60 ZR17
Front pressure (bar): 2.8
Rear pressure (bar): 2.8
Drivetrain
Drive chain: 520 chain
Ignition
Plug gap: 0.7-09 mm
Fluids & Filters
Engine oil: SAE15W-40, API SG
Engine oil (with filter, L): 2.2
Engine oil (without filter, L): 2
Oil filter: Hiflofiltro HF112
Air filter: Hiflofiltro HFA1929
Coolant (L): 1.6
Brake fluid: DOT 4
Fuel consumption
Estimated range: ~354 km on a full tank (17.0 L)
Service
Battery: YTX12-BS
Service interval (km): 6000
Service interval (months): 12
Valve check (km): 24000
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 24,000 km. Engine oil: oil grade SAE15W-40, API SG, 2.2 L with filter change, 2 L without filter change. Brake fluid: DOT 4. Coolant capacity: 1.6 L. Chain: chain. Tire pressure: front 2.8 bar, rear 2.8 bar (cold). Tire size: front 120/70 ZR17, rear 160/60 ZR17. 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: SAE 10W-40, 2.7 L (with filter)
- OEM OEM recommended engine oil (SAE 15W-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 |
- Premium Liqui Moly Motorbike 4T
- Standard Repsol Moto Racing 4T (Synthetic)
- Standard Elf Moto 4 Tech (Semi-Synthetic)
- Standard TotalEnergies Quartz Moto 4T
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 HF112
- Premium Hiflofiltro HF112
- Premium K&N KN-112
Air filter
Spec: Hiflofiltro HFA1929
- Standard Hiflofiltro HFA1929
Spark plug
Spec: NGK LKAR8AI-9, gap 0.8-0.9 mm
- OEM NGK LKAR8AI-9
- Premium NGK LKAR8AI-9
- Standard NGK LKAR8AI-9
Front brake pads
Spec: OEM front pad (EBC equivalent: FA231HH)
- Premium EBC FA231HH
- Standard EBC FA231 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: FA174HH)
- Premium EBC FA174HH
- Standard EBC FA174 (organic)
Drive chain
Spec: chain
Front sprocket
Rear sprocket
Front tire
Spec: 120/70 ZR17, 2.8 bar
- OEM OEM front: 120/70 ZR17
Rear tire
Spec: 160/60 ZR17, 2.8 bar
- OEM OEM 160/60 ZR17
Battery
Spec: OEM battery: Yuasa YTX12-BS
- Premium Yuasa YTX12-BS or YTZ10S (typical 500-750cc)
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Spec: 1.60 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: 24 000 km
