2018-2021 Honda CRF250RMaintenance schedule
Motocross - 250cc four-stroke
Scheduled against races ridden and engine running hours.
Verified
Open the hour meter toolEvery interval on this page was read directly from the OEM chart.
Intervals
- Each race or about 2.5 hours
- Every 3 races or about 7.5 hours
- Every 6 races or about 15.0 hours
- Every 9 races or about 22.5 hours
- Every 12 races or about 30.0 hours
Full schedule (35 items)
| Item | Action | Interval |
|---|---|---|
AIR FILTER | Clean | Every 2.5 hrs |
BRAKE FLUID | Inspect | Every 2.5 hrs |
BRAKE PADS WEAR | Inspect | Every 2.5 hrs |
BRAKE SYSTEM | Inspect | Every 2.5 hrs |
CLUTCH SYSTEM | Inspect | Every 2.5 hrs |
CONTROL CABLES | Inspect, Lubricate | Every 2.5 hrs |
COOLING SYSTEM | Inspect | Every 2.5 hrs |
CRANKCASE BREATHER | Inspect | Every 2.5 hrs |
DRIVE CHAIN | Inspect, Lubricate | Every 2.5 hrs |
DRIVE CHAIN ROLLER | Inspect | Every 2.5 hrs |
DRIVE CHAIN SLIDER | Inspect | Every 2.5 hrs |
DRIVE SPROCKET | Inspect | Every 2.5 hrs |
DRIVEN SPROCKET | Inspect | Every 2.5 hrs |
ENGINE IDLE SPEED | Inspect | Every 2.5 hrs |
ENGINE OIL | Inspect | Every 2.5 hrs |
EXHAUST PIPE/MUFFLER | Inspect | Every 2.5 hrs |
FUEL LINE | Inspect | Every 2.5 hrs |
NUTS, BOLTS, FASTENERS | Inspect | Every 2.5 hrs |
RADIATOR COOLANT | Inspect | Every 2.5 hrs |
SPARK PLUG | Inspect | Every 2.5 hrs |
SUSPENSION | Inspect | Every 2.5 hrs |
THROTTLE OPERATION | Inspect | Every 2.5 hrs |
WHEELS/TIRES | Inspect | Every 2.5 hrs |
DRIVE CHAIN | Replace | Every 7.5 hrs |
FORK OIL EXCEPT DAMPER | Replace | Every 7.5 hrs |
SWINGARM/SHOCK LINKAGE | Lubricate | Every 7.5 hrs |
ENGINE OIL | Replace | Every 15 hrs |
ENGINE OIL FILTER | Replace | Every 15 hrs |
PISTON AND PISTON RINGS | Replace | Every 15 hrs |
PISTON PIN | Replace | Every 15 hrs |
VALVE CLEARANCE/DECOMPRESSOR SYSTEM | Inspect | Every 15 hrs |
FORK OIL DAMPER | Replace | Every 22.5 hrs |
STEERING HEAD BEARINGS | Inspect | Every 22.5 hrs |
FUEL LINE | Replace | Every 30 hrs |
FUEL PUMP FILTER | Replace | Every 30 hrs |
Every row above is factory schedule, straight from the chart. Intervals are shown in hrs.
Specs
From the 2018 manual's technical data section. Check yours before buying — these change between model years.
- Displacement
- 249.43 cm3 (15.215 cu-in)
- Bore × stroke
- 79.000 x 50.887 mm (3.1102 x 2.003 in)
- Compression ratio
- 13.9:1
- Idle speed
- 2,000 +/- 100 rpm
- Valve clearance (cold)
- intake: 0.11 +/- 0.03 mm (0.004 +/- 0.001 in)
- exhaust: 0.19 +/- 0.03 mm (0.007 +/- 0.001 in)
- Spark plug
- NGK R0451B-8
- Plug gap
- 0.60-0.70 mm (0.024-0.028 in)
- Engine oil
- after draining: 1.08 L (1.14 US qt)
- after draining + filter: 1.12 L (1.18 US qt)
- after disassembly: 1.35 L (1.43 US qt)
- spec: Pro Honda GN4 4-stroke Oil or equivalent
- Coolant
- after draining: 0.94 L (0.99 US qt)
- after disassembly: 1.08 L (1.14 US qt)
- spec: Pro Honda HP Coolant or equivalent silicate-free ethylene glycol, 50:50 with distilled water
- Fuel
- tank: 6.3 L (1.66 US gal)
- spec: Unleaded, pump octane 91 or higher
- Tire pressure (cold)
- front: 100 kPa (15 psi)
- rear: 100 kPa (15 psi)
- Tires
- front: 80/100-21 51M Dunlop MX3SF
- rear: 100/90-19 57M Dunlop MX3S
- type: bias-ply, tube
- Fork oil
- except damper: 356 cm3 (12.0 US oz)
- damper: 243 cm3 (8.2 US oz)
- Drive chain
- D.I.D 520DMA4K / 114RB
- Final reduction
- 3.692
- Transmission
- 5-speed constant mesh
- Fuse
- main 10 A
- Battery
- HY85S lithium-ion 12V-2.0 Ah
Legend
- I — Inspect and clean, adjust, lubricate or replace if necessary
- C — Clean
- R — Replace
- A — Adjust
- L — Lubricate
Chart notes
- 1. Clean after every moto for dusty riding condition.
- 2. Replace every 2 years. Replacement requires mechanical skill.
- 3. Replace after the first break-in ride.
- 4. Inspect after the first break-in ride.
- 5. Replace the engine oil, if the clutch discs and plates are replaced.
- 6. Replace every year.
From the manual
- Perform the Pre-ride Inspection at each scheduled maintenance period.
- This maintenance schedule is based on average riding conditions; machines subjected to severe use require more frequent servicing.
- Honda recommends the items in this schedule be serviced by referring to the official Honda Service Manual.
Source: 2018 Honda CRF250R Owner's Manual (31K95600) · Chart read from the 2018 manual. Intervals change between model years — confirm against yours.
Always confirm intervals, torque specs and part numbers against your own service manual. This site is a shopping aid, not a repair manual.
Open the hour meter tool