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#860691 10/13/21 6:58 pm
Joined: Jan 2008
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J
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J
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Just noticed this one:
[Linked Image from i.postimg.cc]
Missing a grommet?


1978 Bonneville T140V PX
Triumphs on eBay
JBMorris #860695 10/13/21 7:48 pm
Joined: Sep 2021
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Fitting the missing grommet won't necessarily fix that leak because the grommet that's missing is more of a guide for the cable than a seal and it tends to go rock hard after a while. The proper seal for the cable is inside the chaincase and is made from a more flexible rubber that grips a tubular guide. The issue with the seal in the chaincase is that if the primary chain is out of adjustment, it can and will grind away at the seal and its holder. If you don't want to remove the chaincase then a blob of silicone sealant might fix it.
John


1971 BSA B25T (built as replica of proposed 1972 B25T)
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Thanks JH,
Looking at the parts manual shows 70-9360 sleeve nut & 70-4144 rubber grommet.
This bike was recently rebuilt so was surprised to see a leak.
Will try a dab of silicone - don't really want to remove the cover right now.
BTW, a new triplex chain and tension blade were replaced.


1978 Bonneville T140V PX
JBMorris #860724 10/14/21 6:26 am
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Hi JBMorris, The flat wire sleeve on repro stators is very, very, very prone to leaking. I hate them! The original round was fine.

I've had much trouble with these repro wires. If it was my bike I'd clean the upper area very well. Try to get as much oil out of the "wire tube" area as possible. The silicone the snot out of it. Get the upper wire grommet that goes into this hole & feed it down the wire after unplugging the snap connectors. I've found long term silicon is the only cure. Silicon the upper grommet in also. Let it cure a good 48 hours as the silicone will cure very slowly. Of course it has to be very clean or silicon won't stick. Suzuki Bond has become my silicon of choice these days.

It is true the inner boot is supposed to be the better seal. However it likes to leak with this wire sleeve.
Don


1973 Tiger 750
JBMorris #860735 10/14/21 11:29 am
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If I paid someone to rebuild my engine and it was returned like that, I’d be worrying about what else they missed….

I’d pull the cover and see if the inner grommet is there as the outer one is clearly missing.

If silicone is used properly here it’s easy to get this area oil-tight, regardless of the shape of the wire. I thread the wire through the case and slide the outer grommet into place. Holding the outer grommet in place, I inject the silicone into the sleeve nut, filling it. Then slide inner grommet into place. Let it cure for 12 hours and Bob’s yer uncle.

Of course, sleeve nut and outer grommet area need to be properly prepped with brake cleaner/alcohol to ensure proper adhesion of silicone.

Steve

Last edited by JubeePrince; 10/14/21 11:32 am.

'77 T140J Silver Jubilee
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Fitting round pegs into square holes since 1961...

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