Yamaha WR450F(Y) 2009 Owner's Service Manual page 60

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MAINTENANCE INTERVALS FOR COMPETITION USE
Item
CARBURETOR
Inspect, adjust and clean
SPARK PLUG
Inspect and clean
Replace
DRIVE CHAIN
Lubricate, slack, alignment
Replace
COOLING SYSTEM
Check coolant level and leakage
Check radiator cap operation
Replace coolant
Inspect hoses
OUTSIDE NUTS AND BOLTS
Retighten
AIR FILTER
Clean and lubricate
Replace
OIL FILTER
Replace
ENGINE GUARD
Replace
FRAME
Clean and inspect
FUEL TANK, COCK
Clean and inspect
BRAKES
Adjust lever position and pedal
height
Lubricate pivot point
Check brake disc surface
Check fluid level and leakage
Retighten brake disc bolts, cali-
per bolts, master cylinder bolts
and union bolts
Replace pads
Replace brake fluid
FRONT FORKS
Inspect and adjust
Replace oil
Replace oil seal
Every
After
third
Every
break-
race
(or 500
in
km)
3-5
Every
fifth (or
As re-
1,000
quired
km)
Use chain lube.
Chain slack: 48–58 mm (1.9–2.3 in)
Every two years
Refer to "STARTING AND BREAK-
IN" section in the CHAPTER 1.
Use foam air-filter oil or equivalent oil.
Breakage
Every one year
Suspension oil "S1"
Remarks

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