Yamaha YZ450FY 2009 Owner's Service Manual page 273

REAR SHOCK ABSORBER SETTING
PARTS
• Rear shock spring "1"
[Equal-pitch titanium spring]
SPRING
TYPE
RATE
4.5
4.7
4.9
SOFT
5.1
5.3
STD 5.5
STIFF 5.7
[Equal-pitch steel spring]
SPRING
TYPE
RATE
4.3
SPRING
PART I.D.
NUMBER MARK
(-22212-)
Green/
1
1C3-00 Green/
2
Green/
3
Red/1
1C3-10 Red/2
Red/3
Black/1
1C3-20 Black/2
Black/3
Blue/1
1C3-30 Blue/2
Blue/3
Yellow/
1
1C3-40 Yellow/
2
Yellow/
3
Pink/1
1C3-50
Pink/2
(1C3-B0)
Pink/3
White/1
1C3-60 White/2
White/3
SPRING
I.D.
PART
MARK/
NUMBER
Q'TY
(-22212-)
Brown/
5UN-00
1
7-12
[Unequal-pitch steel spring]
SPRING
TYPE RATE (ap-
prox.)
SOFT
4.5
4.7
4.9
5.1
5.3
5.5
STIFF 5.7
Install the spring seat "2" to the titanium
spring.
• The unequal-pitch spring is softer in initial
characteristic than the equal-pitch spring and
is difficult to bottom out under full compres-
sion.
• The I.D. mark "a" is marked at the end of the
spring.
• Spring specification varies according to the
color and quantity of I.D. marks.
CHASSIS
SPRING
I.D.
PART
MARK/
NUMBER
Q'TY
(-22212-)
Green/
5UN-A0
2
5UN-B0 Red/2
5UN-C0 Black/2
5UN-D0 Blue/2
Yellow/
5UN-E0
2
5UN-F0 Pink/2
5UN-G0 White/2