clutch breather pipe(?) loose in housing - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 7 (permalink) Old 05-19-2017, 01:41 PM Thread Starter
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Question clutch breather pipe(?) loose in housing

Not sure I've correctly ID'd this so please see photo.

See the black rubber hose leading from the clutch housing; guessing it goes to airbox.

It's clamped to a metal pipe that exits the clutch housing. Is that the breather pipe?

Regardless, it is loose in the housing and slides in and out about 1/4 inch. I noticed it when I saw oil on and around the hose.

How is the pipe supposed be fastened inside the housing? Is there a broken or loose fastener?

Any input appreciated.
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post #2 of 7 (permalink) Old 05-19-2017, 02:07 PM
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On the earlier models like yours, up to VIN number 221608, the hose stub is one-piece with this internal pipe/seal assembly and sealed to the housing by a tiny "O" ring:

Links to discussions about this breather device:

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post #3 of 7 (permalink) Old 05-19-2017, 02:18 PM
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Technically it is the crankcase breather....though it may attached to the clutch housing, since these bikes share the same oil between engine & clutch, pressure from pistons going up/down will be felt inside the clutch housing as well. I suppose it is connected there b/c it is at a high (or highest) point above the oil level.

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post #4 of 7 (permalink) Old 05-19-2017, 02:18 PM
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I have no clue, but the answer may be here:

Check item #32 and note there are different engine numbers.


Last edited by Bjorn Toulouse; 05-19-2017 at 02:21 PM.
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post #5 of 7 (permalink) Old 05-19-2017, 06:11 PM Thread Starter
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Thanks everyone - any worries about riding her while I'm waiting for parts?
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post #6 of 7 (permalink) Old 05-19-2017, 06:49 PM
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Yes, you can continue riding it.

As I recall (vaguely), that degree of play is there, from flexing of the aluminum tube in Forchetto's picture. The stub just slides through the clutch cover, nothing else secures it. If oil is leaking around it, the o-ring might need replacement, as mentioned. You don't have to "wait for parts", just get a replacement o-ring from an automotive or hardware store, or from that gigantic o-ring assortment in your basement.

I put a hose clamp--not too tightly--around that end of the exterior rubber hose to hold it in place.

I suppose that it's also possible that oil blowing through that tube--it does happen sometimes, check the bottom of your airbox--could be leaking around a loose fit of the rubber tube on the stub. A new rubber and/or hose clamp might help with that, and you wouldn't have to remove the clutch cover.

If you do remove the clutch cover, and it's never been removed, buy a gasket for it. You'll have to scrape off the factory gasket in bits and pieces. And don't ever forget the wavy washer!

Consider installing Barnett "green" clutch springs and a Triumph Twin Power Safe-Start while you're in there. You can also replace some seals while you have it open.
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post #7 of 7 (permalink) Old 05-19-2017, 08:38 PM
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The crank case breather tube passes through the crank case side and is sealed with a pressure-fit. I vaguely recall an o-ring being involved.

The tube inside the primary cover can be easily bent. In fact, many have ruined the tube by trying to remove the cover without breaking the hose fitting free of the crank case first (hence stretching and crimping the tube inside the cover).

I would simply try and pull the hose fitting (away from cover) to better seat it into the crank case side. Otherwise, you can properly remove the cover and gently pull the tube away from the cover a smidge.

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