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Honda ST1100 Section => Honda ST1100 General Questions => Topic started by: spanner on February 04, 2015, 01:25:25 PM

Title: break master cyl .... how do you know if its leaking?
Post by: spanner on February 04, 2015, 01:25:25 PM: How do you know if the break master cyc is leaking or needs an over haul etc?

where do you check to see if the break fluid is not low?

Sorry, not very mechanical.

Thanks heaps.
Title: Re: break master cyl .... how do you know if its leaking?
Post by: Brock on February 04, 2015, 01:49:08 PM: If the brake master cylinder is leaking, you will see a drop in fluid level, and a wet patch some where. Around the unions, or at the bottom of the leaking calliper. or even a wet patch on the hose. You would notice a continual dropping level after topping up
Title: Re: break master cyl .... how do you know if its leaking?
Post by: hobs on February 04, 2015, 02:56:21 PM: By-pass leakage in the master cylinder causes the brake lever when depressed to slowly close when constant pressure is applied. The lever should feel firm when compressed as the fluid is pressured. Check all the fittings and caliper assys. externally for any weeping of brake fluid. All components are an easy fix if new seals are required.
Title: Re: break master cyl .... how do you know if its leaking?
Post by: alans1100 on February 04, 2015, 03:45:40 PM: The sight glass on the front brake reservoir should give an indication of your fluid level. Some brake fluids are clear and some are coloured to make it easier to detect leaks (in theory). My fluid is blue (colour coordination.....lol) and is easier to see in the sight glass.

You also need to consider pad wear. As they wear the fluid in the reservoir drops to compensate but it shouldn't go below the minimum level in the sight glass. When you replace the pads, the calliper pistons are pushed back in which then returns the fluid back to the master.

The rear master is easier to see if you remove the RH side panel (side case has to come off)

Apart from replacing pads/fluids when due I've never needed to replace seals or anything to do with brakes in the last 171,000 km. Might be different if you don't ride all year.
Title: Re: break master cyl .... how do you know if its leaking?
Post by: spanner on February 05, 2015, 03:47:03 PM: :like

thanks all
Title: Re: break master cyl .... how do you know if its leaking?
Post by: saaz on February 05, 2015, 04:39:34 PM: The slave cylinder (the one at the other end of the clutch line) is more often the one that causes problems, as it is often neglected when doing a flush, and it gets more heat.
Title: Re: break master cyl .... how do you know if its leaking?
Post by: alans1100 on February 05, 2015, 07:37:19 PM: Quote from: saaz on February 05, 2015, 04:39:34 PM
The slave cylinder (the one at the other end of the clutch line) is more often the one that causes problems, as it is often neglected when doing a flush, and it gets more heat.
That reminds me.........I must do the clutch fluid at the next oil change.......better buy some more fluid since I ran out doing the brakes.......
Title: Re: break master cyl .... how do you know if its leaking?
Post by: Brock on February 05, 2015, 07:53:56 PM: Quote
better buy some more fluid since I ran out doing the brakes.......

:eek :eek :eek :eek

Oh no, not Clutch fluid in the brakes?????? Next you will be putting brake fluid in the clutch.......

:popcorn :popcorn :popcorn :popcorn :popcorn :popcorn :popcorn
Title: Re: break master cyl .... how do you know if its leaking?
Post by: spanner on February 06, 2015, 08:38:00 AM: :rofl :rofl :rofl :rofl
Title: Re: break master cyl .... how do you know if its leaking?
Post by: Kev Murphy on February 09, 2015, 01:29:31 PM: After last service, Mechanic said to me... "You gotta leak in your clutch slave cylinder hose"

I quipped "Oh, GREAT!....How often do I have to do THAT?"

(http://i154.photobucket.com/albums/s277/cool_blue_ice_2002/topup.gif)
Title: Re: break master cyl .... how do you know if its leaking?
Post by: Nigel on February 09, 2015, 05:52:47 PM: Kev, your a card.............. :Stirpot :fp.......... :wht11