Kawasaki KX 450 (2021) — Specs
Identity
Manufacturer: Kawasaki
Model: KX 450
Category: Off-Road Bike
Type: Off-Road Bike
Years: 2021 → 2021
Engine
Displacement (cc): 450
Cylinders: 1
Torque (Nm): 50
Dimensions
Overall length: 2175 mm
Overall width: 830 mm
Overall height: 1265 mm
Wheelbase: 1480 mm
Ground clearance: 335 mm
Tank (L): 6.2
Tires
Front tire: 80/100-21
Rear tire: 120/80-19
Fluids & Filters
Oil filter: Hiflofiltro HF207
Air filter: Hiflofiltro HFA2402
Brake fluid: DOT 4
Service
Battery: YTX5L-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. Brake fluid: DOT 4. Chain: chain 520. Tire size: front 80/100-21, rear 120/80-19. 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 4T (100% Synthetic, Ester)
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 HF207
- Premium Hiflofiltro HF207
Spark plug
Front brake pads
Spec: OEM front pad (EBC equivalent: FA185HH)
- Premium EBC FA185HH
- Standard EBC FA185 (organic)
Rear brake pads
Spec: OEM rear pad (EBC equivalent: FA208HH)
- Premium EBC FA208HH
- Standard EBC FA208 (organic)
Front tire
Spec: 80/100-21
- OEM OEM 80/100-21
Rear tire
Spec: 120/80-19
- OEM OEM 120/80-19
Brake fluid
Spec: DOT 4
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
Suspension
Spec: 49 mm USD fork
- OEM Fork: 49 mm USD fork
Air filter
Spec: Hiflofiltro HFA2402
- Standard Hiflofiltro HFA2402
Drive chain
Battery
Spec: OEM battery: Yuasa YTX5L-BS
