| Author |
Message |
    
Ratbuell
| | Posted on Monday, May 26, 2014 - 09:29 pm: | 
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Rebuild the master cylinder, it sounds like it isn't releasing like it should. |
Cheese
| | Posted on Tuesday, May 27, 2014 - 10:57 am: |
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Thanks. I read an earlier thread that there are no rebuild kits available for this MC.
I can pull it apart and clean it out.
Is there a rear brake set up from another model that will bolt up?
I had a caliper problem on my old BMW and it turned out that old Guzzis use the same brembo part and it was cheaper and easier to source.
Is there any carry over like this that you are aware of for rear brakes on the buells?
Thanks again for the ongoing advice. |
Lynrd
| | Posted on Tuesday, May 27, 2014 - 11:09 am: |
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I was able to find a new S2 Master cylinder under the HD part number about two months ago - i think from either New Castle or Surdyke.
Later style calipers will fit if you change the hanger bracket as wel. |
Lynrd
| | Posted on Tuesday, May 27, 2014 - 09:04 pm: |
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There is a repair kit listed in the parts catalog as well
41781-94Y - Master Cyl Assembly
45073-94Y - Repair kit |
Cheese
| | Posted on Wednesday, May 28, 2014 - 05:55 am: |
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Thanks Lynrd |
Cheese
| | Posted on Thursday, June 12, 2014 - 12:56 pm: |
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Told by parts department at local hd/buell store that parts are unavailable. This was after they made an effort and checked the computer. Here is hoping that opening it up and cleaning burnout does the job. |
Phelan
| | Posted on Thursday, June 12, 2014 - 01:52 pm: |
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The rear brake is a Brembo setup used on several different bikes. I would seek contact with them directly about finding a rebuild kit. |
Basti
| | Posted on Thursday, June 12, 2014 - 03:38 pm: |
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older KTM like LC4 used the same rear brake and if I remember correct also the Aprilia Moto6.5 |
Cheese
| | Posted on Friday, June 13, 2014 - 09:16 pm: |
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Thanks for the heads up |
Screamer
| | Posted on Sunday, June 15, 2014 - 10:39 pm: |
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Try Lance at St. Paul Harley-Davidson. He carries a lot of items that they don't list on their website or EBay. |
Cheese
| | Posted on Monday, August 11, 2014 - 04:15 pm: |
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Well, I thought I had it sorted, but wet on a longer ride and had brake binding again.
I decided to redo the entire rear brake system:
rebuilt the master cylinder - some mild residue.
Brand new brake line.
Cleaned the rear light switch - was not functioning (rear light dims with rear brake pedal). There was a lot of residue in the switch.
New to the bike rear caliper. free moving pistons, excellent shape.
New brake pads.
I rebuilt and bled the system today using DOT 5 fluid (correct from what I have read). I rode the bike for 30 minutes, all under 40 miles an hour and did not press the brake pedal once.
There was no brake binding - and in the past it would happen well before 30 minutes. However, the rear disk was hot to touch at the end of the ride. I understand some pad drag is normal, but I didn't think the disk should be hot. Does this sound correct to anyone else?
Any insight would be helpful.
Cheers |
Essmjay
| | Posted on Tuesday, August 12, 2014 - 10:22 am: |
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Any chance the rotor is warped or misaligned? Caliper alignment bolt is in the right hole on the swingarm? |
S1owner
| | Posted on Tuesday, August 12, 2014 - 05:07 pm: |
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My S1 would do this the only way I got rid of it was I went with a pm 6 piston caliper in the rear.
What it would do is build pressure but would not release treid everthing rebuild etc it would seam to be fine but after 30 min or so of riding and using the brake it would just keep building pressure but not releasing. |
Cheese
| | Posted on Wednesday, August 13, 2014 - 06:18 am: |
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Anything is possible. I will check the caliper alignment, rotor, etc. though I don't think this is the problem as there is no catch point or friction point as it is up on a stand. The wheel spins fine. It is only after riding that the problem happens. And it is not a small problem. We are talking smoking pads high heat, rear brake engaged kind of binding. The old caliper is gone. The new one on there has not been hot. I would like to keep it that way.
I think a new rear brake system may be the only solution if this fails - it is mostly new anyway.
I would love to hear more about what you used for a replacement caliper, master, etc.
My last question is: why DOT5? Could this be a problem that can be solved with a different fluid? Are the properties of dot5 and dot4 significant enough to warrant a try? |
Cheese
| | Posted on Wednesday, August 13, 2014 - 06:23 am: |
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One final point. When I bought the bike there was no report from the prior owner that the back brake was a problem.
Of course the back brake didn't really do anything when I purchased the bike. The fluid was low and dirty and not purple (dot5?), but golden (dot4?). The problem started aFter I replaced the fluid and bled the lines, etc. I also did no try to ride it for any longer period of time until I had some feel in the brakes (after they were serviced). Before someone suggests that the two fluids gelled and ruined my system. All the parts on the current system are new and have only seen dot5 fluid.
(Message edited by Cheese on August 13, 2014) |
S1owner
| | Posted on Wednesday, August 13, 2014 - 06:55 am: |
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Here is what I had it is rare only seen one other PM caliper and bracket
 |
