Yamaha FJR1300A Service Manual

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FEATURES1-4ET3P61050OUTLINE OF THE UNIFIED BRAKE SYSTEMThe Yamaha unified brake system is a system that operates one set of pistons in the front brakes to-gether with the rear brake when the brake pedal is depressed. Compared to conventional brake sys-tems, the ability to slow the vehicle using the simple operation of the brake pedal is improved.Unified brake system block diagramWhen the brake lever is squeezed, both sets of pistons in the left front brake caliper are operated, butonly one set of pistons in the right front brake caliper is operated. When the brake pedal is depressed,the rear brake caliper and one set of pistons in the right front brake caliper are operated. The brake linefrom the rear brake master cylinder is split at the hydraulic unit to transmit brake fluid pressure to boththe rear brake caliper and part of the right front brake caliper in the unified brake system. The brakefluid pressure transmitted to the rear brake caliper and part of the right front brake caliper is controlledby the proportioning valve and metering valve respectively. The operation of these two valves ensuresthat the braking feeling of conventional brakes is maintained when a small amount of force is appliedto the brake pedal, such as when making U-turns, and prevents early locking of the rear wheel when alarge amount of force is applied.1 234567 81. Rear brake master cylinder2. Front brake master cylinder3. Rear brake caliper4. Proportioning valve5. Hydraulic unit6. Metering valve7. Left front brake caliper8. Right front brake caliperManuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk