Yamaha WR450F 2021, Owner'S Service Manual

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PERIODIC MAINTENANCE
3-4
12 * Clutch
• Inspect housing, friction plate,
clutch plate and spring.
 
• Replace.

13 * Transmission
• Inspect.

• Replace bearings.

14 * Shift fork, shift cam,
guide bar
• Inspect wear.

15 * Generator rotor nut • Retighten.
 
16 * Muffler
• Inspect and retighten.
 
• Clean.

• Replace.

17 * Crank • Inspect and clean.
 
18 * Throttle body • Inspect.

19 Spark plug
• Inspect and clean.
 
• Replace.

20 Drive chain
• Lubricate, slack, alignment.
 
• Replace.

21 * Cooling system
• Check coolant level and leakage.
 
• Check radiator cap operation.

• Replace coolant. Every two years

• Inspect hoses.

22
Outside nuts and
bolts
• Retighten.
 
23 Air filter
• Clean and lubricate.
 
• Replace.

24 Oil filter • Replace.
 
25 * Engine guard • Replace.

26 * Frame • Clean and inspect.
 
27 * Fuel tank, fuel pump • Clean and inspect.
 
28 * Fuel hose
• Inspect.

• Replace. Every four years

29 * Brake(s)
• Adjust lever position and pedal
position.
 
• Lubricate pivot point.
 
• Check brake disc surface.
 
• Check fluid level and leakage.
 
• Retighten brake disc bolts, caliper
bolts, master cylinder bolts and
union bolts.
 
• Replace pads.

• Replace brake fluid. Every one year

30 * Front fork(s)
• Inspect and adjust.
 
• Replace oil.
 
• Replace oil seal.

No. Item Routine
After
break-in
Every
race
Every
third race
(or 500 km)
Every
fifth race
(or 1000 km)
As
required