Yamaha WR450F 2021 Maintenance Schedule
The 2021 Yamaha WR450F maintenance schedule below covers the manufacturer's recommended service intervals for oil, valve clearance, general maintenance, spark plugs, drive chain maintenance, coolant, air filter, tires and brake fluid. Intervals are shown in kilometres by default and can be switched to miles.
449ccEngine size
41Maintenance items
Official manufacturer manual
Sourced from Yamaha WR450F/WR450FN Owner's Manual BDB-28199-51 (2022, 1st edition) (this document covers model years 2019–2023): yamahacity.com.au
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Engine oil | See notes | Easy | Replace engine oil. |
| Valve clearance check & adjustment | See notes | Expert | Check and adjust valve clearances. |
| Valve springs | See notes | Expert | Check valve spring free length. |
| Valve lifters | See notes | Expert | Check valve lifters for scratches and wear. |
| Camshaft | See notes | Expert | Inspect camshaft surface and decompression system. |
| Camshaft sprocket | See notes | Advanced | Check camshaft sprocket teeth for wear and damage. |
| Piston, piston ring & piston pin | See notes | Expert | Inspect piston for cracks/carbon deposits, check ring end gap, inspect pin. |
| Cylinder head | See notes | Expert | Inspect carbon deposits and change the cylinder head gasket. |
| Cylinder | See notes | Expert | Inspect cylinder bore for score marks and wear. |
| Clutch | See notes | Advanced | Inspect clutch housing, friction plates, clutch plates and springs. |
| Transmission | See notes | Expert | Inspect transmission; replace bearings as needed. |
| Shift fork, shift cam & guide bar | See notes | Expert | Inspect shift fork, shift cam and guide bar for wear. |
| Generator rotor nut | See notes | Moderate | Retighten the generator rotor nut. |
| Muffler | See notes | Easy–Moderate | Inspect, retighten, clean and replace the muffler. |
| Crank | See notes | Expert | Inspect and clean the crank assembly. |
| Throttle body | See notes | Moderate | Inspect the throttle body. |
| Spark plug | See notes | Easy | Inspect, clean, and replace the spark plug. |
| Drive chain | See notes | Easy | Lubricate drive chain; check slack and alignment. |
| Cooling system | Replace every 24 months | Easy–Moderate | Check coolant level and leakage, check radiator cap operation, replace coolant, inspect hoses. |
| Outside nuts and bolts | See notes | Easy | Retighten chassis and engine fasteners. |
| Air filter | See notes | Easy | Clean and lubricate the air filter. |
| Oil filter | See notes | Easy | Replace the oil filter. |
| Engine guard | See notes | Easy–Moderate | Replace the engine guard. |
| Frame | See notes | Moderate | Clean and inspect the frame. |
| Fuel tank & fuel pump | See notes | Moderate | Clean and inspect the fuel tank and fuel pump. |
| Fuel hose | Replace every 48 months | Moderate | Inspect the fuel hose; replace on schedule. |
| Brake system inspection & adjustment | See notes | Moderate | Adjust lever/pedal position, lubricate pivot point, check disc surface, check fluid level/leakage, retighten disc/caliper/master-cylinder/union bolts. |
| Brake pad replacement | See notes | Moderate | Replace front and rear brake pads. |
| Front forks | See notes | Advanced | Inspect/adjust front forks; replace fork oil and oil seal. |
| Front fork oil seal & dust seal | See notes | Moderate | Clean and lubricate the fork oil seal and dust seal. |
| Protector guide | See notes | Easy | Replace the fork protector guide. |
| Rear shock absorber | See notes | Advanced | Inspect/adjust the rear shock absorber; lubricate and retighten. |
| Drive chain guide & roller | See notes | Easy | Inspect the drive chain guide and roller. |
| Drive chain stopper | See notes | Easy | Inspect the drive chain stopper. |
| Swingarm | See notes | Moderate | Inspect, lubricate and retighten the swingarm. |
| Relay arm & connecting rod | See notes | Moderate | Inspect, lubricate and retighten the relay arm and connecting rod. |
| Sidestand | See notes | Easy | Lubricate the sidestand. |
| Steering head | See notes | Moderate | Inspect steering head free play, retighten, clean/lube, replace bearings. |
| Tire, wheels & spokes | See notes | Moderate | Inspect air pressure, wheel runout, tire wear and spoke looseness; retighten sprocket bolt; service wheel bearings. |
| Throttle & control cable | See notes | Easy | Check cable routing/connection and lubricate. |
| Brake fluid replacement | Every 24 months · Replace every 12 months | Moderate | Replace front and rear brake fluid. |
No maintenance items match your search.
Easy: basic tools, straightforward Easy–Moderate: varies by task — somewhere between the two Moderate: some mechanical know-how helps Advanced: specialized tools/skill, still DIY-doable Expert: significant experience required Professional: dealer or shop recommended
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