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Yamaha YZ250 2021 User Manual

Yamaha YZ250 2021
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CHASSIS
3-24
TIP
Do not give a half turn (180) or more for one
tightening.
Make sure that tightening after a break-in is
done until the initial looseness in nipples disap-
pears.
Make sure that tightening is done in stages, not
at a time.
EAM30245
CHECKING THE WHEELS
1. Check:
Wheel
Damage/out-of-round Replace.
WARNING
EWA13260
Never attempt to make any repairs to the
wheel.
TIP
After replacing a tire or a wheel, always balance
the wheel.
EAM30253
CHECKING THE CHASSIS FASTENERS
Make sure that all nuts, bolts, and screws are
properly tightened.
Refer to “CHASSIS TIGHTENING TORQUES”
on page 2-10.
EAM30248
CHECKING AND LUBRICATING THE
CABLES
The following procedure applies to all of the in-
ner and outer cables.
WARNING
EWA13270
Damaged outer cable may cause the cable to
corrode and interfere with its movement. Re-
place damaged outer cable and inner cables
as soon as possible.
1. Check:
Outer cable
Damage Replace.
2. Check:
Cable operation
Rough movement Lubricate.
TIP
Hold the cable end upright and pour a few drops
of lubricant into the cable sheath or use a suit-
able lubricating device.
EAM30483
LUBRICATING THE BRAKE LEVER
1. Lubricate the pivoting points and metal-to-
metal moving parts of the following parts.
Brake lever
EAM30503
LUBRICATING THE CLUTCH LEVER
1. Lubricate the pivoting points and metal-to-
metal moving parts of the following parts.
Clutch lever
EAM30250
LUBRICATING THE PEDAL
1. Lubricate the pivoting point and metal-to-met-
al moving parts of the pedal.
EAM30504
CHECKING THE SIDESTAND (for YZ250X)
1. Check:
Sidestand operation
Check that the sidestand moves smoothly.
Rough movement Repair or replace.
Spoke nipple wrench (6–7)
90890-01521
Spoke nipple wrench (6–7)
YM-01521
Nipple (spoke)
2.5 N·m (0.25 kgf·m, 1.8 lb·ft)
1
G089060
T
R
.
.
Recommended lubricant
Engine oil or a suitable cable lu-
bricant
Recommended lubricant
Silicone grease
Recommended lubricant
Lithium-soap-based grease
Recommended lubricant
Lithium-soap-based grease

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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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