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Brakes, wheels and tyres


A Brake caliper bleed valve


B Attach one end of the hose to the

Bleed valve, submerge the other in the fluid

Container


A Check the fluid level in the reservoir


 


nrWJJTl If it's not possible to produce "■MUSM a firm feel to the lever or

6Pull the dust cap off the caliper bleed valve (see illustration).Attach one end of the clear vinyl or plastic hose to the bleed valve and submerge the other end in the brake fluid in the container (see illustration).

7Remove the reservoir cover and check the fluid level. Do not allow the fluid level to drop below the lower mark during the bleeding process (see illustrations)

8Carefully pump the brake lever or pedal three or four times and hold it in (front) or down (rear) while opening the bleed valve. When the valve is opened, brake fluid will flow out of the caliper into the clear hose and the lever will move toward the handlebar or the pedal will move down. If there is air in the system there should be air bubbles in the brake fluid coming out of the caliper.

9 Retighten the bleed valve, then release the brake lever or pedal gradually. Top-up the reservoir and repeat the process until no air bubbles are visible in the brake fluid leaving the caliper and the lever or pedal is firm when applied. On completion, disconnect the hose, then tighten the bleed valve to the torque setting specified at the beginning of this Chapter and install the dust cap.

10 Top-up the reservoir, Install the
diaphragm, diaphragm plate and cover, wipe
up any spilled brake fluid and check the entire
system for leaks. Check the operation of the
brakes before riding the motorcycle.


Hint

pedal the fluid my be aerated. Let the brake fluid in the system stabilise for a few hours and then repeat the procedure when the tiny bubbles in the system have settled out.

Fluid change

11Changing the brake fluid is a similar process to bleeding the brakes and requires the same materials plus a suitable tool for siphoning the fluid out of the hydraulic reservoir. Also ensure that the container is large enough to take all the old fluid when it is flushed out of the system.

12Follow Steps 3, 4 and 6 above, then remove the reservoir top, diaphragm plate and diaphragm and siphon the old fluid out of the reservoir. Fill the reservoir with new brake fluid, then follow Step 8.

13Retighten the bleed valve, then release the brake lever or pedal gradually. Keep the reservoir topped-up with new fluid to above the LOWER level at all times or air may enter the system and greatly increase the length of the task. Repeat the process until new fluid can be seen emerging from the bleed valve.

A

Old brake fluid is invariably much darker in colour than new fluid, making it easy to see when


all old fluid has been expelled from the system.

14 Disconnect the hose, tighten the bleed valve to the specified torque and install the dust cap.



15 Top-up the reservoir, install the diaphragm, diaphragm plate and cover, wipe up any spilled brake fluid and check the entire system for leaks.

16Check the operation of the brakes before riding the motorcycle.


Date: 2016-01-14; view: 648


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