CRF250RX (2021) - Motorcycle Honda - Free user manual and instructions
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| Product Type | Off-road Enduro Motorcycle |
| Brand | Honda |
| Model | CRF250RX (2021) |
| Engine Type | Liquid-cooled, 4-stroke single-cylinder |
| Displacement | 249 cc |
| Bore x Stroke | 79.0 mm x 50.9 mm |
| Compression Ratio | 13.9:1 |
| Fuel System | Programmed Fuel Injection (PGM-FI) |
| Ignition | Full transistorized battery ignition |
| Transmission | 6-speed, constant mesh |
| Final Drive | #520 chain (14T/51T) |
| Front Suspension | Showa 49 mm inverted telescopic fork, 300 mm stroke |
| Rear Suspension | Pro-Link Showa single shock, 316 mm stroke |
| Front Brakes | Single 260 mm disc with twin-piston caliper |
| Rear Brakes | Single 240 mm disc with single-piston caliper |
| Wheelbase | 1486 mm (58.5 in) |
| Seat Height | 950 mm (37.4 in) |
| Ground Clearance | 327 mm (12.9 in) |
| Fuel Capacity | 8.0 L (2.1 US gal) |
| Curb Weight | 121.5 kg (268 lb) (wet) |
| Electrical System | 12V, battery maintained with generator |
| Starting System | Electric start |
| Maintenance Interval | Oil change every 600 km (373 mi) or after each race |
| Recommended Oil | SAE 10W-30, API SG or higher, JASO T903 MA |
| Air Filter Cleaning | Every 15 hours of operation (off-road use) |
Frequently Asked Questions - CRF250RX (2021) Honda
What type of oil should I use for my Honda CRF250RX?
Use a high-quality SAE 10W-30 motor oil that meets API SG or higher and JASO T903 MA standard for wet clutch compatibility.
How often should I change the oil?
For off-road use, change the engine oil every 600 km (373 miles) or after each race. The transmission oil should be changed at the same interval.
What is the recommended tire pressure?
Front tire: 15 psi (1.0 bar) for off-road. Rear tire: 15 psi (1.0 bar) for off-road. Adjust based on terrain.
How do I adjust the suspension?
Use the clickers on the fork and shock. For front fork: compression damping (top) and rebound (bottom). For rear shock: low-speed compression (blue), high-speed compression (red), and rebound (white). Refer to manual for base settings.
What is the spark plug gap and type?
Use NGK LMAR9G spark plug. Gap: 0.7-0.8 mm (0.028-0.031 in).
How do I clean the air filter?
Remove the filter, wash with non-flammable solvent, dry, re-oil with foam filter oil, and squeeze out excess. Clean every 15 hours or after dusty conditions.
What is the torque spec for the oil drain bolt?
Tighten the engine oil drain bolt to 20 N·m (2.0 kgf·m, 14 lbf·ft).
Can I convert the CRF250RX to street legal?
It is designed for off-road only. Street conversion requires adding lights, horn, mirrors, and meeting local regulations; check with your DMV.
What is the chain slack specification?
Drive chain slack should be 35-45 mm (1.4-1.8 in) when measured at the middle of the chain run with the bike on a stand.
How do I check coolant level?
With engine cold, check the reserve tank. Level should be between LOW and FULL marks. Use a 50/50 mix of distilled water and high-quality ethylene glycol coolant.
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USER MANUAL CRF250RX (2021) Honda
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Product information
Brand : Honda
Model : CRF250RX (2021)
Category : Motorcycle