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Rev counter cable break

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Barry View Drop Down
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    Posted: 27 Oct 2019 at 14:37
Just about to replace one of these on my T3 - or the inner, at least. Any Really Good Tips for helping them to operate and for their general well-being?

I'm thinking in terms of "lubrication" rather than run, which I think I've got reasonably right. Not 100% sure, but I think this one has lasted about 5 years and even then it's possible that it came to me already unhappy.

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Ben. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ben. Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 14:52
Naturally you would also change the outer if there were signs of external damage, but the question arises , does the outer suffer internal damage ... is it worth forking out for a complete new cable ? 
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Barry View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barry Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 15:05
Outer's fine. No idea if the inner of the outer is damaged, but I'm a risk taker. I even have tubed tyres.

So, just to reiterate - I'm replacing the inner. Any tips, e.g. on lubrication of the inner?
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Dave P. View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 15:40
Well, tradition as far as I know has always been..............

Lubricate the rotating inner cable (Shaft)sparingly with graphited grease, leaving the top two inches ungreased to avoid grease entering the instrument.

Now wash your hands!
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 17:32
Where did it break? That will be the weak point.
Brian.

Better 5 minutes late in this world than years early in the next.
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Barry View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barry Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 20:17
I've no reason to suspect any particular "weak spot" - this break was about 6 inches down from the tacho mount, and the last one (some years) back was, as I recall, some 6 inches or so up from the tacho drive. I've had more tyres replaced in the same period, so *shrugs*.

But you are certainly right. It probably broke at a weak spot.

Graphited grease, check. Thanks @Dave_P
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 21:18
Light graphited grease, yes.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 22:47
when these or speedo cables break they often trash the outer, so it can be false economy to only replace inner if it fails a bit quick then you will know it is the common places to go the bend at the bottom or the bend at the top ...... they need checking i do it annually 
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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2019 at 22:56
As Ken says, they normally break at a bend. If you grease them say,twice a year, you can get a good idea of their condition. If you don't grease them at all, the inner will sometimes rust badly enough to seize to the outer and thereby twist the whole lot into an irretrievable mess.
How do I know this?
TO LIVE OUTSIDE THE LAW YOU MUST BE HONEST.

1971 V7 Special. 1972 850GT.
1970 T120 Bonnie. 2009 500 Bullet.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote theone&onlymin Quote  Post ReplyReply Direct Link To This Post Posted: 28 Oct 2019 at 08:23
Indeed. I replaced my cable on the G5 so many times that I took the rev counter off. For those that may not know, it had a small tacho that mounted "your side" of the handlebars. The cable running up through the steering stem with a fairly tight bend at the bottom.
I've never missed having it, so I haven't,  in the couple of hundred thousand miles since removal.

Cheers
Min
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Glawster Quote  Post ReplyReply Direct Link To This Post Posted: 28 Oct 2019 at 08:38
[QUOTE=Barry]Outer's fine. No idea if the inner of the outer is damaged, but I'm a risk taker. I even have tubed tyres.

LOLLOL 

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Post Options Post Options   Thanks (1) Thanks(1)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 28 Oct 2019 at 10:52
When you grease the inner, leave about 100mm at the instrument end clear of grease as otherwise it can migrate up into the works. At leat it can with Smiths chronometrics.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 29 Oct 2019 at 15:39
Mine used to rust at the bottom so broke there. No amount of cleaning and greasing seemed to help. For a couple of years I averaged 2 new speedo and 1 new tacho cable inners per year. The dawn of enlightenment moment came with the realisation that rain and/or spray water is getting into the tops of the rubber bootee / grommet thingies at the bottom ends of the outer sleeves which are supposed to prevent such ingress, but are obviously failing. I sealed them by wrapping them to the cable outer with insulation tape, and the tape is secured with a small cable tie to stop it unravelling. I used to put a couple of squirts of oil from my oiling can into each sleeve, before putting the, greased, inner in. No more broken cables! Big smile




"Chicken nuggets don't dance on a Tuesday."
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