Author Topic: C11 chaincase leaks  (Read 432 times)

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Offline kdm

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Re: C11 chaincase leaks
« Reply #15 on: May 21, 2019, 09:58:19 pm »
Don't worry about it too much as it will possibly leak oil ftom somewhere else....
1954 C11g

Offline ThomasC11

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Re: C11 chaincase leaks
« Reply #16 on: May 22, 2019, 06:36:09 am »
Hi Alan,

Quote
I have LM bearing grease, is that what you've used?  I'm aware that there are different greases like there are different oils.

You can use regular roller bearing grease.
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Otherwise I'm tempted by the run it dry and spray on chain grease and accept that modern sprays do things that work wonders.  The thing is, what's a modern spray?  Seriously I don't have a clue.  The C11 is the only machine I own.

You find it in a regular DIY store or a motorcycle shop. For me Curil K on both sides of the cork gasket on a possibly flat surface (no hammering) works reasonably well, combined with oil of viscosity 50 in the case.

Cheers, Thomas
1946 BSA C11
1937 Sunbeam Model 9
... and a dented Opel

Offline timsdad

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Re: C11 chaincase leaks
« Reply #17 on: May 22, 2019, 07:22:07 am »
It's quite common to run primary cases dry, Alan, and I've done it on different bikes in the past. The clutch centre bearing is fine for years with just the grease that it's assembled with and clutch plates need no oil. A squirt of chain grease from an aerosol through the hole every few hundred miles or so is enough to keep the chain, clutch plate tongues and cush-drive lubed because they're protected from dirt and the elements by being enclosed. Being open to road grit and weather is the main cause of wear on the rear chain.

Before the invention of chain grease in aerosols, I used to just poke a bit of universal truck grease through the hole, onto the chain, with a finger every week or two, or when I remembered, when I used an old Matchless for riding to work many years ago.

You may ask why anyone bothers with oil in their primary chain case these days but I don't know the answer to that. I think it's just because that's how BSA designed them so we just keep trying to get them oil tight again.


Ray
Just a motorcyclist.

Offline ThomasC11

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Re: C11 chaincase leaks
« Reply #18 on: May 22, 2019, 12:06:33 pm »
At least for me this is pure nostalgia and the fun of solving problems.  ::)
1946 BSA C11
1937 Sunbeam Model 9
... and a dented Opel

Offline Rusty

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Re: C11 chaincase leaks
« Reply #19 on: May 22, 2019, 04:09:12 pm »
Chains
While on the subject of chains, I stripped down my C11 for rebuild, and I have de-greased the chains as both felt gritty, but look in good order, and wondered if any recommendations on “deep lubrication” methods of the chains before fitting them back on? I was given a hint many years ago when I did the same on an RE, to coil them in a pot, cover them with lots of grease, slow heat the grease (another good use for a BBQ in Australia!) and let it “soak in”, wipe off the excess. Apparently, it fills the crevices, rollers etc. i didn't at the time as I replaced the chains. Is this urban myth, or worth doing?
Cheers
Rusty

Offline timsdad

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Re: C11 chaincase leaks
« Reply #20 on: May 22, 2019, 05:37:41 pm »
If they're nice and clean and dry, Rusty, the primary chain just needs oiling all round it with engine oil or whatever if you're keeping an oil bath in the primary case. The rear chain needs a good dose of chain grease from a proper aerosol before fitting - I lay mine flat on a bit of newspaper and lube it several hours before fitting. This can also be done with the primary chain if you like, especially if you're using the same method of lubrication when in use.

The stuff we used to boil up was called 'Linklyfe' or some other brand name because there were several. We called it all Linklyfe like all vacuum cleaners are often called hoovers. This was solid grease which the coiled chain sat on and then sank to the bottom when it melted on the cooker hob. We soon learned to tie a piece of wire round one end to fish it out of the tin when it was nearly boiling. This was all superseded by cans of chain grease to squirt on that penetrates the rollers before the thinners evaporates. As it's mostly thinners and fresh air, I think it's almost as expensive as printing ink. Linklyfe was messier but much cheaper.

A pal decided to grease his chain with Linklyfe when he came home from the pub one Saturday night, several years ago, because he was riding in an enduro the next day. He fell asleep in the chair and set fire to the house.


Ray
Just a motorcyclist.

Offline Rusty

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Re: C11 chaincase leaks
« Reply #21 on: May 22, 2019, 06:10:29 pm »
Sound advice thanks Ray, I'd much rather not mess about with something that might end in tears, and after all the advice I've seen on this site, I'm swayed towards spray lube on the primary chain too, and not have to worry about leaks from the tin ware.
Cheers
Rusty

Offline Ginge

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Re: C11 chaincase leaks
« Reply #22 on: May 22, 2019, 07:56:40 pm »
I hammered the flange of my chaincase flat on the bench but then dressed the inner surface with a file. The high spots were quite obvious.  It’s made a difference.
Ginge.

Offline jacksboy

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Re: C11 chaincase leaks
« Reply #23 on: May 22, 2019, 08:28:23 pm »
Yes then what you do is poor it back into the bike and start all over again it's great fun and also it keeps you busy.

Offline jacksboy

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Re: C11 chaincase leaks
« Reply #24 on: May 22, 2019, 08:35:21 pm »
Sorry i was answering Hampshirebiker question on page one.