zed
Weekend rider
Posts: 90
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Post by zed on Apr 20, 2022 15:43:46 GMT 1
Hi all, after a run out yesterday I noticed a few splatters of brake fluid on the rad guard and looks to be seeping out of the junction, it's a totally standard set up now but I'm going to upgrade to braided lines I just wondered if anyone's had trouble with the junction itself as when I gave the line a little tighten up it didn't feel too good.
Cheers
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Post by abar121 on Apr 20, 2022 16:36:13 GMT 1
I've not had that I'm afraid.
Time to strip it down and see if the thread or faces of the coupler are damaged. I would go for black HEL lines myself, perhaps three lines if the couple is ok, otherwise two.
Cheers.
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 20, 2022 16:50:21 GMT 1
I've not had that I'm afraid. Time to strip it down and see if the thread or faces of the coupler are damaged. I would go for black HEL lines myself, perhaps three lines if the couple is ok, otherwise two. Cheers. Two lines? Is that just a case of a longer bolt and fastening both to the master cylinder? I'll get the junction off and have a good look as the threads as it didn't feel great when I tightened it a little. Cheers. |
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Post by abar121 on Apr 20, 2022 16:53:28 GMT 1
I've not had that I'm afraid. Time to strip it down and see if the thread or faces of the coupler are damaged. I would go for black HEL lines myself, perhaps three lines if the couple is ok, otherwise two. Cheers. Two lines? Is that just a case of a longer bolt and fastening both to the master cylinder? I'll get the junction off and have a good look as the threads as it didn't feel great when I tightened it a little. Cheers. Yep that's it. A longer banjo bolt goes into the master cylinder. One tip, if you want to reuse the cooper washer seals, you can heat them up until cherry red, then quench 'em in cold water. Cheers. |
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 20, 2022 17:13:33 GMT 1
Two lines? Is that just a case of a longer bolt and fastening both to the master cylinder? I'll get the junction off and have a good look as the threads as it didn't feel great when I tightened it a little. Cheers. Yep that's it. A longer banjo bolt goes into the master cylinder. One tip, if you want to reuse the cooper washer seals, you can heat them up until cherry red, then quench 'em in cold water. Cheers. Thanks for your help mate👍 |
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Post by chrisg on Apr 20, 2022 18:24:53 GMT 1
3 lines for me, stock looks better.JMHO.
I have re-used the copper washers after anealing them. (Just read the head gasket thread )😁
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 20, 2022 19:16:14 GMT 1
3 lines for me, stock looks better.JMHO. I have re-used the copper washers after anealing them. (Just read the head gasket thread )😁 I agree 3 lines do look better but it depends on the condition of the coupling as I can't find any replacements on the Internet. |
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Post by Tobyjugs on Apr 20, 2022 22:02:53 GMT 1
Not sure where to begin with my reply. There's nothing wrong with the original setup or the two line set up.
Copper washers are very popular but I think they tend to need a higher torque figure to seal them compared to aluminium washers.
Banjo bolts are not that strong and can be easily be deformed or broken if you are a gorilla with little mechanical feeling.
That's why I prefer aluminium sealing washers.
If it was me I would get some aluminium washers and join everything together again and see what happens.
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Post by chrisg on Apr 20, 2022 23:27:29 GMT 1
3 lines for me, stock looks better.JMHO. I have re-used the copper washers after anealing them. (Just read the head gasket thread )😁 I agree 3 lines do look better but it depends on the condition of the coupling as I can't find any replacements on the Internet. Have a look on eb, there are other bikes with the same set up that have the splitter (if thats its name) |
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Post by JonW on Apr 20, 2022 23:54:38 GMT 1
The splitters are the same on many of our bikes, even the 500 has the same one etc.
I'd take this one off and have a look and use new washers as Toby says.
Reusing old copper washers is a bit dodgy when youre not 17 and skint lol
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Post by shaunthe2nd on Apr 21, 2022 0:14:03 GMT 1
Agreed new copper washers every time, I bought a box years ago and think they work out pennies each.
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 21, 2022 5:32:10 GMT 1
Cheers guys I think I'll get it off and give it a good clean and refit with some new washers 👍
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 21, 2022 7:55:46 GMT 1
Just for reference does anyone have the two line set up on a standard 350lc? I wondered what length they need to be.
Cheers.
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Post by abar121 on Apr 21, 2022 9:08:54 GMT 1
I think the last set I used were 78cm and 80cm eye to eye. One eye at the m/c should be angled 20 degrees or so, to clear the first banjo.
Retailers used to offer a two line option as well as a three, not sure how common that is now.
If you like the standard look, go for the three line. I have that on stock bikes, but prefer two lines on modified stuff.
Cheers.
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 21, 2022 10:39:27 GMT 1
I think the last set I used were 78cm and 80cm eye to eye. One eye at the m/c should be angled 20 degrees or so, to clear the first banjo. Retailers used to offer a two line option as well as a three, not sure how common that is now. If you like the standard look, go for the three line. I have that on stock bikes, but prefer two lines on modified stuff. Cheers. Nice one thanks mate, I'm not sure which way yet it depends on the condition of the join piece when I get it off. Cheers. |
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Post by bare on Apr 21, 2022 18:21:13 GMT 1
IF ? wanting to reuse the copper washers ? One heats then lets them air cool....Never Quench.
Quenching hardens.. Not anneals :-)
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Post by arrow on Apr 21, 2022 18:30:47 GMT 1
IF ? wanting to reuse the copper washers ? One heats then lets them air cool....Never Quench. Quenching hardens.. Not anneals :-) Sorry bare, that's not the case with copper. It's quenched in cold water. |
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Post by stusco on Apr 21, 2022 21:13:51 GMT 1
Yep quenched in cold water
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Post by dougw on Apr 22, 2022 8:53:50 GMT 1
Lifted from a text book :-
Annealing the copper requires a high temperature. Copper melts at 1357Kelvin
and annealing generally occurs at greater than half the melting point in degrees K; even
higher temperature causes faster annealing (but not past the melting temperature, of
course). Typical temperature to use is 400C or 700F. Annealing causes the structure to
create and grow new grains that are free of strain. The new grains remove all
dislocations and other defects caused by the deformation, thus leaving the material in its
original soft condition, although NOT in its original shape—it will still be the same shape
as after deformation, but can be easily bent again.
Cooling rate after annealing does not matter (except at 10 million degrees per
second the material would get harder again)
• This is not ‘heat treating.’ Heat treating of actually causes a change in crystal
structure, typically used in steel. There is no change in crystal structure .
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Post by shaunthe2nd on Apr 22, 2022 9:57:21 GMT 1
Just fit new!
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 22, 2022 11:19:03 GMT 1
Yes ordered some already, £1.35 for 25👍 |
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 29, 2022 7:16:27 GMT 1
The leak has been sorted thanks to a few new copper washers, the cause of the leak was the banjo bolt hitting the fork brace due to a large pothole (see pic). I think I need to stiffen the front a fair bit.  |
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Post by JonW on Apr 29, 2022 8:03:28 GMT 1
EEEK!
Thats some hit!
Yes, is there even any oil in the forks?! lol
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 29, 2022 8:14:06 GMT 1
EEEK! Thats some hit! Yes, is there even any oil in the forks?! lol It sure is Jon, I haven't checked the oil yet but I don't think there can be enough in there, might throw some progressive springs in when I sort it out. |
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Post by abar121 on Apr 29, 2022 10:12:08 GMT 1
Glad you got to the bottom of it anyway.
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zed
Weekend rider
Posts: 90
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Post by zed on Apr 29, 2022 10:51:58 GMT 1
Glad you got to the bottom of it anyway. Yes me too thanks mate. |
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Post by JonW on Apr 29, 2022 13:40:18 GMT 1
yes, good point. Its great to understand why there is an issue not just the fix.
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