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2017-2020 Honda CRF450R / CRF450RX / CRF450RWEMaintenance schedule

Motocross / cross-country - 450cc four-stroke

Scheduled against races (CRF450RX) or motos (CRF450R/RWE) ridden, and engine running hours.

Verified

Every interval on this page was read directly from the OEM chart.

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Intervals

  • Each race or about 3.5 hours
  • Every 2 races or about 7.5 hours
  • Every 4 races or about 15.0 hours
  • Every 6 races or about 22.5 hours
  • Every 8 races or about 30.0 hours
  • Each moto or about 2.5 hours

Full schedule (69 items)

2017-2020 Honda CRF450R / CRF450RX / CRF450RWE scheduled maintenance items and intervals
ItemActionIntervalChart
AIR FILTER
Clean
Every 2.5 hrs
CRF450R/RWE
BRAKE FLUID
Inspect
Every 2.5 hrs
CRF450R/RWE
BRAKE PADS WEAR
Inspect
Every 2.5 hrs
CRF450R/RWE
BRAKE SYSTEM
Inspect
Every 2.5 hrs
CRF450R/RWE
CLUTCH SYSTEM
Inspect
Every 2.5 hrs
CRF450R/RWE
CONTROL CABLES
Inspect, Lubricate
Every 2.5 hrs
CRF450R/RWE
COOLING SYSTEM
Inspect
Every 2.5 hrs
CRF450R/RWE
CRANKCASE BREATHER
Inspect
Every 2.5 hrs
CRF450R/RWE
DRIVE CHAIN
Inspect, Lubricate
Every 2.5 hrs
CRF450R/RWE
DRIVE CHAIN ROLLER
Inspect
Every 2.5 hrs
CRF450R/RWE
DRIVE CHAIN SLIDER
Inspect
Every 2.5 hrs
CRF450R/RWE
DRIVE SPROCKET
Inspect
Every 2.5 hrs
CRF450R/RWE
DRIVEN SPROCKET
Inspect
Every 2.5 hrs
CRF450R/RWE
ENGINE IDLE SPEED
Inspect
Every 2.5 hrs
CRF450R/RWE
ENGINE OIL
Inspect
Every 2.5 hrs
CRF450R/RWE
EXHAUST PIPE/MUFFLER
Inspect
Every 2.5 hrs
CRF450R/RWE
FUEL LINE
Inspect
Every 2.5 hrs
CRF450R/RWE
NUTS, BOLTS, FASTENERS
Inspect
Every 2.5 hrs
CRF450R/RWE
RADIATOR COOLANT
Inspect
Every 2.5 hrs
CRF450R/RWE
SPARK PLUG
Inspect
Every 2.5 hrs
CRF450R/RWE
SUSPENSION
Inspect
Every 2.5 hrs
CRF450R/RWE
THROTTLE OPERATION
Inspect
Every 2.5 hrs
CRF450R/RWE
WHEELS/TIRES
Inspect
Every 2.5 hrs
CRF450R/RWE
AIR FILTER
Clean
Every 3.5 hrs
CRF450RX
BRAKE FLUID
Inspect
Every 3.5 hrs
CRF450RX
BRAKE PADS WEAR
Inspect
Every 3.5 hrs
CRF450RX
BRAKE SYSTEM
Inspect
Every 3.5 hrs
CRF450RX
CLUTCH SYSTEM
Inspect
Every 3.5 hrs
CRF450RX
CONTROL CABLES
Inspect, Lubricate
Every 3.5 hrs
CRF450RX
COOLING SYSTEM
Inspect
Every 3.5 hrs
CRF450RX
CRANKCASE BREATHER
Inspect
Every 3.5 hrs
CRF450RX
DRIVE CHAIN
Inspect, Lubricate
Every 3.5 hrs
CRF450RX
DRIVE CHAIN ROLLER
Inspect
Every 3.5 hrs
CRF450RX
DRIVE CHAIN SLIDER
Inspect
Every 3.5 hrs
CRF450RX
DRIVE SPROCKET
Inspect
Every 3.5 hrs
CRF450RX
DRIVEN SPROCKET
Inspect
Every 3.5 hrs
CRF450RX
ENGINE IDLE SPEED
Inspect
Every 3.5 hrs
CRF450RX
ENGINE OIL
Inspect
Every 3.5 hrs
CRF450RX
EXHAUST PIPE/MUFFLER
Inspect
Every 3.5 hrs
CRF450RX
FUEL LINE
Inspect
Every 3.5 hrs
CRF450RX
NUTS, BOLTS, FASTENERS
Inspect
Every 3.5 hrs
CRF450RX
RADIATOR COOLANT
Inspect
Every 3.5 hrs
CRF450RX
SIDE STAND
Inspect
Every 3.5 hrs
CRF450RX
SPARK PLUG
Inspect
Every 3.5 hrs
CRF450RX
SUSPENSION
Inspect
Every 3.5 hrs
CRF450RX
THROTTLE OPERATION
Inspect
Every 3.5 hrs
CRF450RX
WHEELS/TIRES
Inspect
Every 3.5 hrs
CRF450RX
DRIVE CHAIN
Replace
Every 7.5 hrs
CRF450RX
DRIVE CHAIN
Replace
Every 7.5 hrs
CRF450R/RWE
SWINGARM/SHOCK LINKAGE
Lubricate
Every 7.5 hrs
CRF450RX
SWINGARM/SHOCK LINKAGE
Lubricate
Every 7.5 hrs
CRF450R/RWE
ENGINE OIL
Replace
Every 15 hrs
CRF450RX
ENGINE OIL
Replace
Every 15 hrs
CRF450R/RWE
ENGINE OIL FILTER
Replace
Every 15 hrs
CRF450RX
ENGINE OIL FILTER
Replace
Every 15 hrs
CRF450R/RWE
PISTON AND PISTON RINGS
Replace
Every 15 hrs
CRF450RX
PISTON AND PISTON RINGS
Replace
Every 15 hrs
CRF450R/RWE
PISTON PIN
Replace
Every 15 hrs
CRF450RX
PISTON PIN
Replace
Every 15 hrs
CRF450R/RWE
VALVE CLEARANCE/DECOMPRESSOR SYSTEM
Inspect
Every 15 hrs
CRF450RX
VALVE CLEARANCE/DECOMPRESSOR SYSTEM
Inspect
Every 15 hrs
CRF450R/RWE
FORK OIL
Replace
Every 22.5 hrs
CRF450RX
FORK OIL
Replace
Every 22.5 hrs
CRF450R/RWE
STEERING HEAD BEARINGS
Inspect
Every 22.5 hrs
CRF450RX
STEERING HEAD BEARINGS
Inspect
Every 22.5 hrs
CRF450R/RWE
FUEL LINE
Replace
Every 30 hrs
CRF450RX
FUEL LINE
Replace
Every 30 hrs
CRF450R/RWE
FUEL PUMP FILTER
Replace
Every 30 hrs
CRF450RX
FUEL PUMP FILTER
Replace
Every 30 hrs
CRF450R/RWE

Every row above is factory schedule, straight from the chart. Intervals are shown in hrs.

Specs

From the 2020 manual's technical data section. Check yours before buying — these change between model years.

Displacement
449.7 cm3
Compression ratio
13.5:1
Idle speed
2,000 +/- 100 rpm
Valve clearance (cold)
  • intake: 0.13 +/- 0.03 mm (0.005 +/- 0.001 in)
  • exhaust: 0.28 +/- 0.03 mm (0.011 +/- 0.001 in)
Spark plug
NGK SILMAR9A-9S (standard); NGK SILMAR10A-9S for extended high-speed riding
Plug gap
0.8-0.9 mm (0.031-0.035 in)
Engine oil
  • after draining: 1.00 L (1.06 US qt)
  • after draining + filter: 1.04 L (1.10 US qt)
  • after disassembly: 1.35 L (1.43 US qt)
  • spec: Pro Honda GN4 4-stroke Oil or equivalent
Coolant
  • after draining: 1.07 L (1.13 US qt)
  • after disassembly: 1.15 L (1.22 US qt) CRF450RX; 1.13 L (1.19 US qt) CRF450R/RWE
  • spec: Pro Honda HP Coolant or equivalent silicate-free ethylene glycol, 50:50 with distilled water
Fuel
  • tank: 8.5 L (2.25 US gal) CRF450RX; 6.3 L (1.66 US gal) CRF450R/RWE
  • spec: Unleaded, pump octane 91 or higher
Tire pressure (cold)
  • front: 100 kPa (15 psi)
  • rear: 100 kPa (15 psi)
Tires
  • front: CRF450RX 90/90-21 54M Dunlop AT81F; CRF450R/RWE 80/100-21 51M Dunlop MX3SF
  • rear: CRF450RX 120/90-18 65M Dunlop AT81; CRF450R/RWE 120/80-19 63M Dunlop MX3S
  • type: bias-ply, tube
Fork oil
  • except damper: 363 cm3 (12.3 US oz) CRF450RX; 356 cm3 (12.0 US oz) CRF450R/RWE
  • damper: 243 cm3 (8.2 US oz)
Drive chain
CRF450RX RK520EXU/114LE; CRF450R RK520TXZ/114RJ; CRF450RWE GB520TXZ/114RJ
Final reduction
3.846 CRF450RX; 3.769 CRF450R/RWE
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. CRF450RX: clean after every race for dusty riding condition. CRF450R/RWE: 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: 2020 Honda CRF450R/RX/RWE Owner's Manual (31MKE630) · Chart read from the 2020 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.

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