- Brake master cylinder. Damage/scratches/wear → Replace.
- Brake fluid delivery passages (brake master cylinder body). Obstruction → Blow out with compressed air.
![](https://motoinstruction.ru/img/yamaha/20/126465.jpg)
2. Check:
- Brake fluid reservoir tank "1". Cracks/damage → Replace.
- Brake fluid reservoir diaphragm "2". Damage/wear → Replace.
- Brake fluid reservoir diaphragm holder "3". Cracks/damage → Replace.
![](https://motoinstruction.ru/img/yamaha/20/126466.jpg)
3. Check:
- Brake hose "4"
Cracks/damage/wear → Replace.
![](https://motoinstruction.ru/img/yamaha/20/126467.jpg)