brake lever


Information and questions on GL1000 Goldwings (1975-1979)
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Optimurphprime
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2003 Vstar Classic

brake lever

Postby Optimurphprime » Sat Apr 16, 2011 7:15 pm



Was working on the brakes today. found nasty brown gunk (i guess from really old brake fluid) in the cup. Got all that cleaned out and flushed the lines. Took the calipers off and have to get the pistons out. I have seen the how-to and have experience with my brakes on my truck, so no issues there. The question is about the lever and the plunger under the cup. It is sucking air and I can't get any pressure. Is that something that can be rebuilt or do I have to order another lever assembly?

I appreciate the help, this is all I need to get her on the road.
Murph


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MJSantos
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Re: brake lever

Postby MJSantos » Sat Apr 16, 2011 7:37 pm

I think your refering to the front master cylinder. The unit is rebuildable. There's not that much to it just be sure when your cleaning it to make sure the small return hole is clear.

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Optimurphprime
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Re: brake lever

Postby Optimurphprime » Sat Apr 16, 2011 8:12 pm

Thanks, that is good to know.
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Re: brake lever

Postby goldtr6c » Sat Apr 16, 2011 9:03 pm

The air in the hose will tend to go to the top at the master cylinder. Try cracking the hose at the top and bleed out the air at that point. Then Bleed at the calipers to get rid of any old and bubbles in the calipers. Be sure to cover the "tank" up as the brake fluid can ruin your paint.

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Optimurphprime
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Re: brake lever

Postby Optimurphprime » Sun Apr 17, 2011 8:37 am

I'll keep that in mind after I rebuild the master cylinder. I went through that when I switched to stainless steel brake lines on my VStar. Which I will eventually do with this bike. I had forgotten that brake fluid is clear :o
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Re: brake lever

Postby thrasherg » Mon Apr 18, 2011 10:31 am

Optimurphprime wrote:I'll keep that in mind after I rebuild the master cylinder. I went through that when I switched to stainless steel brake lines on my VStar. Which I will eventually do with this bike. I had forgotten that brake fluid is clear :o


And highly Hygroscopic, so don't ever leave any in an open/unsealed container or it will absorb water from the atmosphere and you will have some very odd brakes!! :)

Gary

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Optimurphprime
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Re: brake lever

Postby Optimurphprime » Sat Apr 23, 2011 4:07 pm

Yay, my rebuild kit came in today! Now to borrow some snap ring pliers and get to work!
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Optimurphprime
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Re: brake lever

Postby Optimurphprime » Thu May 12, 2011 9:43 pm

Couldn't borrow any snap ring pliers so I had to hunt some down to buy. The plunger and spring in the kit were smaller than the original (I wonder if they sent the wrong kit?). I cleaned up the plunger and reused it along with the original spring. Used the new snap ring (boy was that a pain) and the boot that covers the snap ring. Was able to rebuild the right side caliper before the sun went down. Tomorrow I will do the left side caliper. I can't wait to get her re-road-tested this Saturday. I should be cruising to work next week!!!! YaY!!!!
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Fred Camper
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Re: brake lever

Postby Fred Camper » Fri May 13, 2011 4:16 pm

Well, too late for you, but it is well known that Honda choose a "wooden" feel for early GL1000's. They reportedly felt at the time that we would lock up two finger brakes. So they specified a 17 mm master cylinder piston that is responsible for the wooden feel. Make no mistake, they stop just fine and can lock up like they should, it just takes more effort than some hands produce. If you desire two finger braking, consider Randakk's outstanding 15 mm piston master cylinder that has a close to stock appearance.

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Optimurphprime
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Re: brake lever

Postby Optimurphprime » Sat May 14, 2011 10:23 pm

I wonder if anyone has ever put an aftermarket or other brand master cylinder on these things. Test rode it today and the brakes were so soft it wasn't funny. I am ordering new pads and new pistons (there is some mild pitting on them). I am getting a little bit of leakage around the new boot I installed with the rebuild of the master cylinder. I have bled the brakes and left the lever half taped back over night (as someone recommended). Still haven't gotten to the rear brake yet. The engine feels good and strong. Not worn out at all (like you think it would be for such an old bike). So my first full ride gets a C+.
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Optimurphprime
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Re: brake lever

Postby Optimurphprime » Sat May 14, 2011 10:50 pm

Just figured out that I ordered the wrong master cylinder rebuild kit. That is why the spring and piston were smaller. I ordered the one for the 77. oops :oops:
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Fred Camper
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Re: brake lever

Postby Fred Camper » Sun May 15, 2011 9:13 am

When you say soft, it sounds like air. If yours has a splitter like my 1977, then that makes getting air out more of a challenge. When I changed my master cylinder to an aftermarket version, I also replaced the brake hoses with stainless steel and eliminated the splitter. Now I have a double banjo bolt at the master cylinder and they pretty much self bleed.

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Re: brake lever

Postby WingAdmin » Sun May 15, 2011 9:54 am

Optimurphprime wrote:Just figured out that I ordered the wrong master cylinder rebuild kit. That is why the spring and piston were smaller. I ordered the one for the 77. oops :oops:


That would explain the leakage!

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Re: brake lever

Postby Old Fogey » Sun May 29, 2011 6:48 pm

Do yourself a favour and fit stainless pistons! Yeah, I know I'm selling them but I sell them for a very good reason, and it ain't the money! Read all the Info here:
http://www.wingovations.com/#/stainless ... 4548580412


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