2002 YAMAHA YZ250F ABS

7 - 19
TUN
CAUTION:
When using a rear shock absorber other
than currently installed, use the one whose
overall length a does not exceed the stan-
dard as it may result in faulty performance.
Never use one whose overall length is
greater than standard.
ÅCoverage of spring by weight
ıRider weight
1Soft
2Standard
3Stiff
Length a of standard shock:
490.5 mm (19.31 in)
SETTING

7 - 20
TUNSETTING
EC72Q000
Rear shock absorber setting parts
Rear shock spring 1
[Equal pitch spring]
[Unequal pitch spring]
* For EUROPE
NOTE:
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. color a is marked at the end of the
spring.
Extent of adjustment (spring length)
TYPESPRING
RATESPRING
PART NUMBERI.D.
COLOR/
POINTSPRING
FREE
LENGTH
SOFT4.4
4.65DH-22212-70
5DH-22212-10Brown/1
Green/1260
260
STD 4.8 5DH-22212-20 Red/1 260
STIFF5.0
5.2
5.4
5.65NG-22212-60
5DH-22212-40
5SF-22212-00
5DH-22212-60Black/1
Blue/1
Yellow/1
Pink/1260
260
265
265
TYPESPRING
RATE
(approx.)SPRING
PART NUMBERI.D.
COLOR/
POINTSPRING
FREE
LENGTH
SOFT4.6
4.85NG-22212-20
5ET-22212-00Green/2
Red/2275
275
*STD 5.0 5ET-22212-10 Black/2 275
STIFF5.2
5.4
5.65ET-22212-30
5ET-22212-40
5NG-22212-50Blue/2
Yellow/2
Pink/2275
275
280
SPRING FREE
LENGTHEXTENT OF
ADJUSTMENT b
260 mm (10.24 in)240.5 ~ 258.5 mm
(9.47 ~ 10.18 in)
265 mm (10.43 in)245.5 ~ 263.5 mm
(9.67 ~ 10.37 in)
275 mm (10.83 in)255.5 ~ 273.5 mm
(10.06 ~ 10.77 in)
280 mm (11.02 in)260.5 ~ 278.5 mm
(10.26 ~ 10.96 in)

7 - 21
TUNSETTING
EC72H002
Suspension setting
Front fork
NOTE:
If any of the following symptoms is experienced with the standard position as the base, make
resetting by reference to the adjustment procedure given in the same chart.
Before any change, set the rear shock absorber sunken length to the standard figure 90 ~
100 mm (3.5 ~ 3.9 in).
SymptomSection
Check Adjust
JumpLarge
gapMedium
gapSmall
gap
Stiff over entire range

Compression damping
Oil level (oil amount)
SpringTurn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Decrease oil level by about 5 ~ 10 mm (0.2 ~ 0.4 in).
Replace with soft spring.
Unsmooth movement
over entire range

Outer tube
Inner tube
Under bracket tightening
torqueCheck for any bends, dents, and other noticeable
scars, etc. If any, replace affected parts.
Retighten to specified torque.
Poor initial
movement

Rebound damping
Oil sealTurn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Apply grease in oil seal wall.
Soft over entire range,
bottoming out

Compression damping
Oil level (oil amount)
SpringTurn adjuster clockwise (about 2 clicks) to increase
damping.
Increase oil level by about 5 ~ 10 mm (0.2 ~ 0.4 in).
Replace with stiff spring.
Stiff toward stroke end
Oil level (oil amount) Decrease oil level by about 5 mm (0.2 in).
Soft toward stroke end,
bottoming out
Oil level (oil amount) Increase oil level by about 5 mm (0.2 in).
Stiff initial movement
Compression dampingTurn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Low front, tending to
lower front posture

Compression damping
Rebound damping
Balance with rear end
Oil level (oil amount)Turn adjuster clockwise (about 2 clicks) to increase
damping.
Turn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Set sunken length for 95 ~ 100 mm (3.7 ~ 3.9 in) when
one passenger is astride seat (lower rear posture).
Increase oil level by about 5 mm (0.2 in).
“Obtrusive” front, tend-
ing to upper front pos-
ture

Compression damping
Balance with rear end
Spring
Oil lever (oil amount)Turn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Set sunken length for 90 ~ 95 mm (3.5 ~ 3.7 in) when
one passenger is astride seat (upper rear posture).
Replace with soft spring.
Decrease oil level by about 5 ~ 10 mm (0.2 ~ 0.4 in).

7 - 22
TUNSETTING
Rear shock absorber
NOTE:
If any of the following symptoms is experienced with the standard position as the base, make
resetting by reference to the adjustment procedure given in the same chart.
Adjust the rebound damping in 2-click increments or decrements.
Adjust the low compression damping in 1-click increments or decrements.
Adjust the high compression damping in 1/6 turn increments or decrements.
SymptomSection
Check Adjust
JumpLarge
gapMedium
gapSmall
gap
Stiff, tending to sink

Rebound damping
Spring set lengthTurn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Set sunken length for 90 ~ 100 mm (3.5 ~ 3.9 in) when
one passenger is astride seat.
Spongy and unstable

Rebound damping
Low compression damping
SpringTurn adjuster clockwise (about 2 clicks) to increase
damping.
Turn adjuster clockwise (about 1 click) to increase
damping.
Replace with stiff spring.
Heavy and dragging

Rebound damping
SpringTurn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Replace with soft spring.
Poor road gripping

Rebound damping
Low compression damping
High compression damp-
ing
Spring set length
SpringTurn adjuster counterclockwise (about 2 clicks) to
decrease damping.
Turn adjuster clockwise (about 1 clicks) to increase
damping.
Turn adjuster clockwise (about 1/6 clicks) to increase
damping.
Set sunken length for 90 ~ 100 mm (3.5 ~ 3.9 in) when
one passenger is astride seat.
Replace with soft spring.
Bottoming out

High compression damp-
ing
Spring set length
SpringTurn adjuster clockwise (about 1/6 turn) to increase
damping.
Set sunken length for 90 ~ 100 mm (3.5 ~ 3.9 in) when
one passenger in astride seat.
Replace with stiff spring.
Bouncing

Rebound damping
SpringTurn adjuster clockwise (about 2 clicks) to increase
damping.
Replace with soft spring.
Stiff travel

High compression damp-
ing
Spring set length
SpringTurn adjuster counterclockwise (about 1/6 turn) to
decrease damping.
Set sunken length for 90 ~ 100 mm (3.5 ~ 3.9 in) when
one passenger is astride seat.
Replace with soft spring.

TUNEINSTELLUNG
Fahrwerksabstimmung
Teleskopgabel
HINWEIS:
Liegen bei Normaleinstellung folgende Symptome vor, wie folgt vorgehen.
Vor der Einstellung der Gabel das Federbein auf die Standard-Federeinbaulänge von 90–100 mm
einstellen.
SymptomStrecke
Prüfen EinstellenSprungGroße
Boden-
senkeMittlere
Boden-
senkeKleine
Boden-
senke
Hart über den gesam-
ten Bereich
Druckstufendämpfung
Ölstand (Ölmenge)
FederEinsteller (um etwa 2 Rasten) gegen den Uhrzeiger-
sinn drehen, um die Dämpfungskraft zu verringern.
Ölstand um etwa 5–10 mm senken.
Weichere Feder einbauen.
Rauh über den gesam-
ten Bereich

Gleitrohr
Standrohr
Anzugsmoment (Unterzug)Auf Verbiegung, Schläge, sichtbare Beschädigungen
usw. prüfen. Defekte Teile ggf. erneuern.
Vorschriftsmäßig festziehen.
Zäh am Anfang des
Federwegs

Zugstufendämpfung
DichtringEinsteller (um etwa 2 Rasten) gegen den Uhrzeiger-
sinn drehen, um die Dämpfungskraft zu verringern.
Dichtringwand einfetten.
Weich über den
gesamten Bereich,
schlägt durch

Druckstufendämpfung
Ölstand (Ölmenge)
FederEinsteller (um etwa 2 Rasten) im Uhrzeigersinn dre-
hen, um die Dämpfungskraft zu erhöhen.
Ölstand um etwa 5–10 mm erhöhen.
Härtere Feder einbauen.
Hart gegen Ende des
Federwegs
Ölstand (Ölmenge)Ölstand um etwa 5 mm senken.
Weich gegen Ende
des Federwegs,
schlägt durch
Ölstand (Ölmenge)Ölstand um etwa 5 mm erhöhen.
Hart am Anfang des
Federwegs
DruckstufendämpfungEinsteller (um etwa 2 Rasten) gegen den Uhrzeiger-
sinn drehen, um die Dämpfungskraft zu verringern.
Front niedrig,
Neigung zum Einsin-
ken

Druckstufendämpfung
Zugstufendämpfung
Abstimmung auf Hinterrad
Ölstand (Ölmenge)Einsteller (um etwa 2 Rasten) im Uhrzeigersinn dre-
hen, um die Dämpfungskraft zu verringern.
Einsteller (um etwa 2 Rasten) gegen den Uhrzeiger-
sinn drehen, um die Dämpfungskraft zu verringern.
Einbaulänge (mit aufsitzendem Fahrer, Heck eingefe-
dert) auf 95–100 mm einstellen.
Ölstand um etwa 5 mm erhöhen.
Front hoch, Neigung
zum Aufbäumen

Druckstufendämpfung
Abstimmung auf Hinterrad
Feder
Ölstand (Ölmenge)Einsteller (um etwa 2 Rasten) im Uhrzeigersinn dre-
hen, um die Dämpfungskraft zu senken.
Einbaulänge (mit aufsitzendem Fahrer, Heck eingefe-
dert) auf 90–95 mm einstellen.
Weichere Feder einbauen.
Ölstand um etwa 5–10 mm senken.
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