Soft brakes - Kawasaki Versys Forum
 
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post #1 of 11 (permalink) Old 03-06-2013, 07:25 PM Thread Starter
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Soft brakes

My front brakes are going bad.

The lever goes soft while the bike is sitting. I can pump it a few times and it's fine, but clearly something is wrong. I've startled myself once or twice when the brakes still hadn't engaged and the couple of fingers I had under the lever were getting crushed. Basically the lever will touch the grip on the first actuation of the day.

But....it's odd. I see no leakage. I've bled the brakes and they were great...but a few days later...soft again.

Can anyone tell me what's bad (master or one of the slaves cylinders)?

RR
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post #2 of 11 (permalink) Old 03-06-2013, 08:57 PM
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Year and mileage? Was the brake fluid replaced, and calipers cleaned?
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post #3 of 11 (permalink) Old 03-06-2013, 09:43 PM Thread Starter
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soft brakes

I have about 12,800 miles on the bike which is a 2008 model.

I vacuum bled a significant amount of fluid through both front bleeders. The fluid was completely replaced a couple years back. Both the recent bleed and the previous/first change used Motul 600.

The fluid looked like new coming out.

RR
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post #4 of 11 (permalink) Old 03-06-2013, 09:47 PM
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There could be air trapped in that loop over the fender, in the line coupling both calipers together.
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post #5 of 11 (permalink) Old 03-06-2013, 11:41 PM
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There could be air trapped in that loop over the fender, in the line coupling both calipers together.
Yup. Thats what it sounds like to me as well.
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post #6 of 11 (permalink) Old 03-07-2013, 06:53 AM
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There could be air trapped in that loop over the fender, in the line coupling both calipers together.
Vote #3 for this scenario.


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post #7 of 11 (permalink) Old 03-07-2013, 07:12 AM Thread Starter
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how to fix?

So, if there's air in that loop, how do I bleed the brakes to remove it?

I could see turning the bike upside down , but I'm sure there has to be an easier way.
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post #8 of 11 (permalink) Old 03-07-2013, 07:29 AM
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http://race-lines.co.uk/bleeding/

Seen a while back an alternative method by forcing the brake fluid up from the calliper to the master cylinder, this pushes up the trapped air up priming the system.

My V Blog:
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post #9 of 11 (permalink) Old 03-25-2013, 07:19 AM
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you can also unscrew the left brake caliper and fix it somehow in between master brake cyclinder and the right caliper. No more loophole in the middle!

2008 Kawasaki Versys
1994 Honda NTV 650
1999 Suzuki AN125
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post #10 of 11 (permalink) Old 03-25-2013, 08:33 AM
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Squeeze the lever firmly, open the bleeder quickly. Aggressive bleeding should get rid of the air IF that is the problem.

David
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post #11 of 11 (permalink) Old 03-25-2013, 08:34 AM
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Quote:
Originally Posted by rronald View Post
My front brakes are going bad.

The lever goes soft while the bike is sitting. I can pump it a few times and it's fine, but clearly something is wrong. I've startled myself once or twice when the brakes still hadn't engaged and the couple of fingers I had under the lever were getting crushed. Basically the lever will touch the grip on the first actuation of the day.

But....it's odd. I see no leakage. I've bled the brakes and they were great...but a few days later...soft again.

Can anyone tell me what's bad (master or one of the slaves cylinders)?

RR
If once bleeded the lever is firm and this deteriorate over time, it's because you have either air getting in or a serious problem with master cylinder

Air getting in, make sure the bleeding nipple on the caliper are tightly screwed / closed

Master cylinder, someone will have to chime in

LOP
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