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Yamaha YZ250 2021 User Manual

Yamaha YZ250 2021
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CHASSIS
8-15
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.
Low front, tend-
ing to lower front
posture

Compression
damping force
Turn adjuster clockwise (about 2
clicks) to increase damping.
Rebound damp-
ing force
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Balance with rear
end
Set sunken length for 95–100
mm (3.7–3.9 in) when one pas-
senger is astride seat (lower rear
posture).
Oil amount
Increase oil amount by about 5
cm³ (0.2 US oz, 0.2 Imp.oz).
“Obtrusive” front,
tending to upper
front posture

Compression
damping force
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Balance with rear
end
Set sunken length for 90–95 mm
(3.5–3.7 in) when one passenger
is astride seat (upper rear pos-
ture).
Spring Replace with soft spring.
Oil amount
Decrease oil amount by about 5–
10 cm³ (0.2–0.3 US oz, 0.2–0.4
Imp.oz).
Symptom
Section
Check Adjust
Jump
Large
gap
Medium
gap
Small
gap
Stiff, tending to
sink

Rebound damp-
ing force
Turn adjuster counterclockwise
(about 2 clicks) to decrease
damping.
Spring set length
Set sunken length for 90–100
mm (3.5–3.9 in) when one pas-
senger is astride seat.
Spongy and
unstable

Rebound damp-
ing force
Turn adjuster clockwise (about 2
clicks) to increase damping.
Low compres-
sion damping
Turn adjuster clockwise (about 1
click) to increase damping.
Spring Replace with stiff spring.
Symptom
Section
Check Adjust
Jump
Large
gap
Medium
gap
Small
gap

Table of Contents

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Yamaha YZ250 2021 Specifications

General IconGeneral
Engine Type249cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke66.4mm x 72.0mm
Compression Ratio8.9~10.6:1
IgnitionCDI
Transmission5-speed; multiplate wet clutch
Final DriveChain
Suspension RearKYB® single shock; fully adjustable, 12.4-in travel
Brakes FrontHydraulic disc, 270mm
Tires Front80/100-21
Tires Rear110/90-19
Width32.5 in
Height50.8 in
Wheelbase58.5 in
Ground Clearance14.2 in
Fuel Capacity2.1 gal
Wet Weight227 lb
Fuel DeliveryKeihin PWK38S carburetor
Suspension FrontKYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Brakes RearHydraulic disc, 245mm

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