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Yamaha YZ450F 2021 - Page 79

Yamaha YZ450F 2021
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MAINTENANCE INTERVALS
3-3
30 * Front fork leg(s)
Clean. 
Inspect and adjust. 
Replace oil. 
Replace oil seal.
Clean and grease oil seals and
dust seals.

31 Protector guide Replace.
32 * Rear shock absorber
Inspect and adjust. 
Grease pillow balls and bearings.
(After rain ride)

Check for tightening torques. 
33 *Brake(s)
Adjust lever position and pedal
height.

Lubricate pivot point. 
Check brake disc surface. 
Check fluid level and leakage. 
Retighten brake disc bolts, caliper
bolts, master cylinder bolts and
union bolts.
(Check for tightening torques.)

Replace pads.
Replace brake fluid. Every one year
34 * Swingarm Inspect, lube and retighten. 
35 *
Relay arm, connect-
ing rod
Inspect, lube and retighten.

36 * Steering head
Inspect free play and retighten.
(Check for tightening torques.)

Clean and lube.
(After rain ride)
Replace bearings.
37 * Tire, wheels
Inspect air pressure, wheel run-
out, tire wear and spoke loose-
ness.

Retighten sprocket bolt. 
Check the bearing.
Replace
bearings.
Lubricate.
38 * Drive chain
Clean, lubricate, slack, alignment. 
Replace.
39 * Drive chain guide Inspect wear.
40 *
Drive chain guide and
drive chain support
Replace.
41 Cables
Routing (Connection) 
Check and grease. 
Check throttle cables on the throt-
tle body for dirt and wear.

42 Levers Adjust clutch lever free play.
No. Item Routine
After
break-in
Every
race
(about 2.5
hours)
Every
third race
(about 7.5
hours)
Every
fifth race
(about 12.5
hours)
As
required

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