Yamaha WR450F 2021 Owner's Service Manual page 94

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

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Wr450fm 2021

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