Yamaha YZ450FA 2011, Owner'S Service Manual

Page: 74 / 318

3-3
MAINTENANCE INTERVALS
EXHAUST PIPE, SI-
LENCER, PROTEC-
TOR
Inspect and retighten
● ●
Clean
●
Replace fiver
● ●
*
* When the exhaust
sound becomes louder
or when a performance
drop is felt.
CRANK
Inspect and clean
● ●
THROTTLE BODY
Inspect
●
SPARK PLUG
Inspect and clean
● ●
Replace
●
DRIVE CHAIN Use chain lube.
Lubricate, slack,
alignment
● ●
Chain slack: 50–60 mm
(2.0–2.4 in)
Replace
●
COOLING SYSTEM
Check coolant level
and leakage
● ●
Check radiator cap
operation
●
Replace coolant
●
Every two years
Inspect hoses
●
OUTSIDE NUTS AND
BOLTS
Retighten
● ●
Refer to "STARTING
AND BREAK-IN" section
in the CHAPTER 1.
AIR FILTER
Clean and lubricate
● ●
Use foam air-filter oil or
equivalent oil.
Replace
●
OIL FILTER
Replace
● ●
Item
After
break-in
Every
race
(about
2.5
hours)
Every
third
(about
7.5
hours)
Every
fifth
(about
12.5
hours)
As re-
quired
Remarks