Yamaha YZ250F(X) Owner's Service Manual page 186

When using a rear shock absorber
other than currently installed, use
the one whose overall length "a"
does not exceed the standard as it
may result in faulty performance.
Never use one whose overall
length is greater than standard.
Length "a" of standard
shock:
490 mm (19.29 in)
REAR SHOCK ABSORBER
SETTING PARTS
• Rear shock spring "1"
[Equal-pitch titanium spring]
SPRING
T SPRI
PART
Y NG I.D.
NUM-
P RAT MARK
BER -
E E
22212-
4.5 1C3-00 Green
S
4.7 1C3-10 Red
O
F
4.9 1C3-20 Black
T
5.1 1C3-30 Blue
S
1C3-40
T 5.3 Yellow
(1C3-A0)
D
S 5.5 1C3-50 Pink
TI
F
5.7 1C3-60 White
F
[Equal-pitch steel spring]
SPRING
T SPRI
PART I.D.
Y NG
NUM- MARK/
P RAT
BER - Q'TY
E E
22212-
4.3 5UN-00 Brown/1 260
[Unequal-pitch steel spring]
SPRI
NG SPRING
T
RAT PART
Y
E NUM-
P
(ap- BER -
E
prox. 22212-
)
S
O
4.5 5UN-A0
F
T
4.7 5UN-B0
4.9 5UN-C0
5.1 5UN-D0
5.3 5UN-E0
5.5 5UN-F0
S
5UN-
TI
5.7 22212-
F
G0
F
SPR
Install the spring seat "2" to the ti-
ING
tanium spring.
FRE
E
LEN
• The unequal-pitch spring is softer in
GTH
initial characteristic than the equal-
(ap-
pitch spring and is difficult to bottom
prox
out under full compression.
.)
• The I.D. mark "a" is marked at the
265
end of the spring.
265
• Spring specification varies accord-
ing to the color and quantity of I.D.
265
marks.
265
275
275
275
SPR
ING
FRE
E
LEN
GTH
• Extent of adjustment (spring length)
SPR
ING
I.D.
FRE
MARK/
E
Q'TY
LEN
GTH
Green/2 275
Red/2 275
Black/2 275
Blue/2 275
Yellow/
275
2
Pink/2 275
White/2 275
7-8
CHASSIS
[Titanium spring]
SPRING
EXTENT OF AD-
FREE
JUSTMENT "b"
LENGTH
One I.D. mark
245.5–263.5 mm
(9.67–10.37 in)
Two I.D. marks
Approx.
265 mm
251.5–269.5 mm
(10.43 in)
(9.90–10.61 in)
Three I.D. marks
243.0–261.0 mm
(9.57–10.28 in)
One I.D. mark
255.5–273.5 mm
(10.06–10.77 in)
Two I.D. marks
Approx.
275 mm
261.5–279.5 mm
(10.83 in)
(10.30–11.00 in)
Three I.D. marks
253.0–271.0 mm
(9.96–10.67 in)
[Steel spring]
SPRING
EXTENT OF AD-
FREE
JUSTMENT "b"
LENGTH
260 mm 240.5–258.5 mm
(10.24 in) (9.47–10.18 in)
275 mm 255.5–273.5 mm
(10.83 in) (10.06–10.77 in)