Suspension Setting (Rear Shock Absorber) - Yamaha YZ250FM 2021 Owner's Service Manual

Symptom
Jump
Low front, tend-
ing to lower front
posture
"Obtrusive" front,
tending to upper
front posture
EAM30180

SUSPENSION SETTING (REAR SHOCK ABSORBER)

TIP
• 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.
Symptom
Jump
Stiff, tending to
sink
Spongy and
unstable
Section
Large Medium Small
gap gap gap
 
 
Section
Large Medium Small
gap gap gap
 
 
10-7
Check
Compression Turn adjuster clockwise (about 2
damping force clicks) to increase damping.
Turn adjuster counterclockwise
Rebound damp-
(about 2 clicks) to decrease
ing force
damping.
Set sunken length for 95–100
Balance with rear mm (3.7–3.9 in) when one pas-
end senger is astride seat (lower rear
posture).
Increase oil amount by about 5
Oil amount
cm³ (0.2 US oz, 0.2 Imp.oz).
Turn adjuster counterclockwise
Compression
(about 2 clicks) to decrease
damping force
damping.
Set sunken length for 90–95 mm
Balance with rear (3.5–3.7 in) when one passenger
end is astride seat (upper rear pos-
ture).
Spring Replace with soft spring.
Decrease oil amount by about 5–
Oil amount 10 cm³ (0.2–0.3 US oz, 0.2–0.4
Imp.oz).
Check
Turn adjuster counterclockwise
Rebound damp-
(about 2 clicks) to decrease
ing force
damping.
Set sunken length for 90–100
Spring set length mm (3.5–3.9 in) when one pas-
senger is astride seat.
Rebound damp- Turn adjuster clockwise (about 2
ing force clicks) to increase damping.
Low compres- Turn adjuster clockwise (about 1
sion damping click) to increase damping.
Spring Replace with stiff spring.
CHASSIS
Adjust
Adjust