Yamaha 2006 FJR1300A Service Manual page 21

When the ABS is activated, the flow control valve regulates the flow of brake fluid to the brake and the
solenoid valve decreases and increases the brake fluid pressure.
1. When the brakes are operated normally, the solenoid valve "2" is closed, the spool "3" of the flow
control valve does not move, and the hydraulic line between the brake master cylinder and brake
caliper is open.
2. When the ABS is activated, the solenoid valve "2" is opened by the power supplied from the ABS
ECU signals to decrease the brake fluid pressure and the spool "3" of the flow control valve is
moved toward the solenoid valve.
3. When the ABS ECU stops transmitting signals to decrease the brake fluid pressure, the solenoid
valve "2" closes and the brake fluid is pressurized again. Pressurizing the brake fluid again, while
the ABS is activated, limits the flow of the brake fluid with the movement of the flow control valve
spool "3" and provides a gradual pressure increase.
1. Orifice
2. Solenoid valve
3. Spool
• Buffer chamber
The buffer chamber accumulates the brake fluid that is depressurized while the ABS is operating.
4. Flow control valve
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FEATURES