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Graeme
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Brakes
05/03/18 at 01:33:46
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Hi All.

First post for a while; the Missus & I have been a bit crook. That's not to say that we've been burglarising or similar, just that we have been unwell. I have just recovered from heart surgery that is difficult to express gratitude for and now rapidly approaching "Tarzan" mode.

So, the R65LS has been neglected now for some years and only been ridden for it's compulsory inspection for registration, by others.

I took it for a sorting out run today and the engine is going well but need a carbies tune. The front brakes though, aren't anywhere like putting me over the handle bars on hard braking, like they used to although the lever feels hard. Could this be because it's been ridden with rusty rotors, (now clean, of course.)? Other suggestions? I haven't changed the fluid in years so perhaps I need to do that anyway. The pads were half worn the last time they were checked. They wouldn't have changed much in the miles that they have done since then.

The back brake is effective but squeals like it's in great pain.

Any advises gratefully received.

  

1985 R65 LS
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Graeme
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Re: Brakes
Reply #1 - 05/04/18 at 00:13:54
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Tried bleeding the brakes with a pressure bleeder. The left hand side, no problem. Kept reservoir full and closed the valve when clean fluid was seen.

However, the right hand side produced no fluid. I thought that there may be a blockage but the pressure rose to 15 and then slowly came back to zero. (I guess that there could still be a blockage. The flexibility of the pressure system could account for the slow return).

Before I assume a blockage and start to strip down the system, any suggestions?
  

1985 R65 LS
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Barry
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Re: Brakes
Reply #2 - 05/04/18 at 13:52:42
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That sounds odd. Other than a collapsed flexible inner liner on a brake hose, a blocked nipple seems the most likely cause. With no pressure applied I would completely remove the bleed nipple to see if fluid flows. Normally it will flow under gravity in fact you can bleed the brakes very successfully using only gravity.
  

Barry Cheshire, England 79 R45
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Bob_Roller
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Re: Brakes
Reply #3 - 05/04/18 at 14:16:22
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Sounds like you have a blockage in the caliper area, old degraded fluid, etc .
After 33-34 years, probably time to disassemble the system, clean out the calipers and replace brake lines if they look like they are the original lines .
  

'81 R65
'82 R65 LS  
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!
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Graeme
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Re: Brakes
Reply #4 - 05/04/18 at 18:31:58
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Thanks Barry, Thanks Bob. I disconnected both inlet & bleed nipple. Squeezed brake handle & nothing came through. It looks like a pull down.
I've had done or done the electrics, top end recondition*, back brakes so I shouldn't be surprised now to make further contributions to Motobins. Good on 'em. (Glad they are there, actually.)

* Should this read "extremities recondition?  Smiley
  

1985 R65 LS
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Kelvin
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Re: Brakes
Reply #5 - 05/04/18 at 21:33:12
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I recently rebuilt the brakes on my 1983 R65LS. I got the kit from Munich Motorcycles (West Australia).  There was nothing particularly obnoxious inside the caliper but it was good to clean out 35 years of gunk.
  

1983 R65LS, Sydney, Australia
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Graeme
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Re: Brakes
Reply #6 - 05/05/18 at 16:57:32
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I'll check them out, Kevin. Thanks. In the meantime, it seems that Barry was right. Fluid at the Y section but not coming through the end of the flexible hose.

Is the LS a 15mm master cylinder?
  

1985 R65 LS
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Bob_Roller
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Re: Brakes
Reply #7 - 05/05/18 at 17:43:43
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The diameter is cast into the bottom side of the master cylinder, usually they are 15 mm, but with previous owners, anything is possible . . ...
  

'81 R65
'82 R65 LS  
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!
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Graeme
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Re: Brakes
Reply #8 - 05/06/18 at 01:37:02
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Thanks Bob.
  

1985 R65 LS
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Tony Smith
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Re: Brakes
Reply #9 - 05/07/18 at 03:11:38
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Kelvin wrote on 05/04/18 at 21:33:12:
I recently rebuilt the brakes on my 1983 R65LS. I got the kit from Munich Motorcycles (West Australia). 


It is beyond me how those burglars remain in business! There price before post is usually more than Moto Bin's price including post to Australia.
  

1978 R100RS| 1984 R65 | 1984 XT350 | 1992 KLE500 | 2002 R1150GSA
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