Yamaha YZ250 2022, Owner'S Service Manual

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IMPORTANT INFORMATION
1-8
EAM20089
IMPORTANT INFORMATION
EAM30009
PREPARATION FOR REMOVAL AND
DISASSEMBLY
1. Before the jobs, completely remove mud,
dust, and the like in order to prevent the entry
of them into the inside during the jobs.
Refer to “CARE” on page 1-23.
2. Use proper special tools and equipment. Re-
fer to “SPECIAL TOOLS” on page 1-12.
3. During disassembly, check and measure the
required parts, and make a record of them so
that you may refer to the record when install-
ing them. Moreover, arrange gears, cylin-
ders, pistons, and other parts for each section
so as not to confuse or lose them.
4. During disassembly, clean each of the parts,
and store them in trays for each section.
5. Flammable. Keep servicing areas away from
any source of fire.
6. During servicing, take special care not to re-
ceive an injury or a burn on the engine, the
exhaust pipe, the silencer, or the like.
7. If coolant is left adhered to the chassis, paint
and plating will be damaged. Therefore, rinse
it out with water in good time.
WARNING
EWA18970
Coolant is potentially harmful and should be
handled with special care.
• If it enters your eyes, wash it away with wa-
ter enough and then get medical attention
• If it splashes on your skin or clothes, quick-
ly wash it away with water and then with
soapy water.
• If it is swallowed, immediately induce vom-
iting and get medical attention.
EAM30010
REPLACEMENT PARTS
Make sure that the parts and grease or oil to be
used for repair of the vehicle, including periodic
replacement parts, are new YAMAHA genuine
parts and recommended parts.
Do not use any used parts, because these may
not be genuine though they have similar appear-
ances or because the quality may be changed
by aging.
EAM30011
GASKETS, OIL SEALS AND O-RINGS
1. When overhauling the engine, replace all
gaskets and O-rings. All gasket surfaces, oil
seal lips, and O-rings must be cleaned so that
there may be no dust on them.
2. During assembly, always apply proper oil to
bearings and proper grease to oil seal lips be-
fore installation.