SOHC.co.uk Forums > CB350/400

Whats the thinking - front brake switch replacement.

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McCabe-Thiele (Ted):
I guess they are more reliable than oil switches I'll leave it as it is unless I find it leaks.

Johnny4428:
I bled mine with the syringe method through the bleed valve on Caliper with almost instant success, my system was completely dry with all new pipe work, also used Dot5 fluid which doesn’t harm paintwork.

McCabe-Thiele (Ted):

--- Quote from: Johnny4428 on January 29, 2022, 06:06:12 PM ---I bled mine with the syringe method through the bleed valve on Caliper with almost instant success, my system was completely dry with all new pipe work, also used Dot5 fluid which doesn’t harm paintwork.

--- End quote ---

Was that filling the system with fluid pushed up via the bleed nipple or using it to pull fluid down by means of a partial vacuum?

Johnny4428:
Pushing up through bleed nipple Ted. Just filled syringe and gently pressured up.

McCabe-Thiele (Ted):

--- Quote from: Johnny4428 on February 01, 2022, 08:42:41 AM ---Pushing up through bleed nipple Ted. Just filled syringe and gently pressured up.

--- End quote ---

As it had warmed up a bit I decided to get some fluid into the front brakes - the brakes had no fluid in them so a clean start. I have gone for Silicone fluid. I put 150 cc in my syringe then fed the fluid through the caliper bleed nipple - nice and steady until it appeared in the brake reservoir base - tightened the nipple then topped up the reservoir - about three pulls of the brake lever - a few air bubbles emerged then a good reasonably solid lever.

Emptied the unused fluid back into the bottle - thanks for the tip Roo a great method with no waste.

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