Yamaha WR250F(R) Owner's Service Manual page 618

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FRONT BRAKE AND REAR BRAKE
FREIN AVANT ET FREIN ARRIERE
Brake caliper piston seal kit
1.
Remove:
• Dust seal 1
• Piston seal 2
NOTE:
Remove the piston seals and dust
seals by pushing them with a finger.
CAUTION:
Never attempt to pry out piston
seals and dust seals.
WARNING
Replace the piston seals and dust
seals whenever a caliper is disas-
sembled.
È Front
É Rear
EC5A4000
INSPECTION
Brake master cylinder
1.
Inspect:
• Brake master cylinder inner
surface a
Wear/scratches → Replace
master cylinder assembly.
Stains → Clean.
WARNING
Use only new brake fluid.
È Front
É Rear
2.
Inspect:
• Diaphragm 1
Crack/damage → Replace.
È Front
É Rear
3.
Inspect:
• Brake master cylinder piston
1
• Brake master cylinder cup 2
Wear/damage/score marks →
Replace brake master cylinder
kit.
È Front
É Rear
5 - 41
CHAS
Kit de joint de piston d'étrier de frein
1.
Déposer:
• Joint antipoussière 1
• Joint de piston 2
N.B.:
Déposer les joints de piston et antipous-
sière en les poussant avec le doigt.
ATTENTION:
Ne jamais chasser les joints de piston
et antipoussière hors du cylindre.
AVERTISSEMENT
Toujours changer les joints de piston
et antipoussière lors d'un démontage
d'étrier.
È Avant
É Arrière
CONTROLE
Maître-cylindre de frein
1.
Contrôler:
• Surface interne du maître-cylin-
dre de frein a
Usure/rayures
l'ensemble maître-cylindre.
Taches → Nettoyer.
AVERTISSEMENT
Utiliser uniquement du liquide de
frein neuf.
È Avant
É Arrière
2.
Contrôler:
• Diaphragme 1
Craquelure/endommagement →
Remplacer.
È Avant
É Arrière
3.
Contrôler:
• Piston du maîgre-cylindre de
frein 1
• Coupelle de cylindre du maître-
cylindre de frein 2
Usure/endommagement/rayures
→ Remplacer kit de maître-cylin-
dre de frein.
È Avant
É Arrière
Remplacer

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