Honda CRF 250 RX (2021) — Specs
Identity
Manufacturer: Honda
Model: CRF 250 RX
Category: Off-Road Bike
Type: Off-Road Bike
Years: 2021 → 2021
Engine
Displacement (cc): 250
Cylinders: 1
Torque (Nm): 28
Dimensions
Overall length: 2110 mm
Overall width: 815 mm
Overall height: 1185 mm
Wheelbase: 1445 mm
Ground clearance: 285 mm
Tires
Front tire: 80/100-21
Rear tire: 100/90-19
Front pressure (bar): 1
Rear pressure (bar): 1
Drivetrain
Drive chain: 114 links 520
Sprockets (front / rear): 13 / 48
Ignition
Spark plug: NGK R0451B-8
Plug gap: 0.6-0.7 mm
Fluids & Filters
Engine oil: SAE10W-30, API SG
Oil filter: Hiflofiltro HF116
Air filter: Hiflofiltro HFA1108
Coolant (L): 1
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. Engine oil: oil grade SAE10W-30, API SG. Spark plug: NGK R0451B-8 (gap 0.6-0.7 mm). Brake fluid: DOT 4. Coolant capacity: 1 L. Chain: 114 links 520, sprockets 13/48 teeth. Tire pressure: front 1 bar, rear 1 bar (cold). Tire size: front 80/100-21, rear 100/90-19. 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
Spec: SAE10W-30, API SG
- OEM OEM recommended engine oil (SAE 10W-30)
- 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 HF116
- Premium Hiflofiltro HF116
- Premium K&N KN-116
Air filter
Spec: Hiflofiltro HFA1108
- Standard Hiflofiltro HFA1108
Spark plug
Spec: NGK R0451B-8, gap 0.6-0.7 mm
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)
Drive chain
Spec: 114 links 520 | Sprockets 13/48 teeth / 114 links 520
- OEM OEM chain (pitch 520 (or 428 for some commuter 250s))
Front tire
Spec: 80/100-21, 1.0 bar
- OEM OEM 80/100-21
Rear tire
Spec: 100/90-19, 1.0 bar
- OEM OEM 100/90-19
Battery
Spec: OEM battery: Yuasa YTX5L-BS
Brake fluid
Spec: DOT 4
- Standard TotalEnergies HBF4
Coolant
Spec: 1.00 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: 12 000 km
Suspension
Spec: 49 mm USD fork
- OEM Fork: 49 mm USD fork
