What's this hole / tube for?

[Nurse Julie]

That's the one Julie means, Steve

I bought 17335323000 from DSS - it has no pinch drain but since only the upper part was perished I used only that (or some such memory anyway). No idea why there is a "valve" in it at all. Perhaps to keep the crap out as there is likely no pressure or even some suction...

That part Number Tom is the air inlet breather pipe, so no valve. Unless anyone can tell me why the other has a drain valve, I think I will just order that one from DSS and stick something in the bottom that I can release every now and then. I could always stick a pea up it I suppose  . Thinking about it, it must be suction actually, if you think of the direction the air flows around the system there must be some draw / vaccum up the tube, so if you go through a deep puddle, I wonder if water would get sucked in?
Regards
Julie

[Nurse Julie]

Just looked on DSS and the drain pipe from the air filter box with the pinch drain at the bottom is now an obsolete part. Does anyone know where else I can get this from?. Its Part No 17358-374-000. They still do the breather pipe from the bottom of the air inlet box which is handy as that's the one I'm missing completely.
Julie

measure the outlets and order Nitrile rubber smooth pipe

Hi Trig
We use Nitrile rubber pipe at work but I've got a feeling what we use is a lot larger bore. Do you think it matters if it does not have the valve in the bottom ?
Regards
Julie

[tom400f]

Oh OK. I remember wondering at the time because the nomenclature is ambiguous. Obviously I bought the wrong bit but... the pinch thing is separate and I reused the old one I had. It slips over the bottom of the tube, about 2cm long.

Not saying these were ever separate parts but hey, it's just a blind bit of tubing with a cut in the end. Perhaps something could be made...

[tom400f]

Go through a deep puddle ? 

[Trigger]

Just looked on DSS and the drain pipe from the air filter box with the pinch drain at the bottom is now an obsolete part. Does anyone know where else I can get this from?. Its Part No 17358-374-000. They still do the breather pipe from the bottom of the air inlet box which is handy as that's the one I'm missing completely.
Julie

measure the outlets and order Nitrile rubber smooth pipe

Hi Trig
We use Nitrile rubber pipe at work but I've got a feeling what we use is a lot larger bore. Do you think it matters if it does not have the valve in the bottom ?
Regards
Julie

Here is what i use>  http://www.ebay.co.uk/itm/140693835989?_trksid=p2055119.m1438.l2649&var=440044001332&ssPageName=STRK%3AMEBIDX%3AIT  But, make sure it is a tight fit. Most bikes have had the stopper thrown away yonks ago. These are only drain pipes.

[Nurse Julie]

Oh OK. I remember wondering at the time because the nomenclature is ambiguous. Obviously I bought the wrong bit but... the pinch thing is separate and I reused the old one I had. It slips over the bottom of the tube, about 2cm long.

Not saying these were ever separate parts but hey, it's just a blind bit of tubing with a cut in the end. Perhaps something could be made...

Gosh, I never thought I would come across anyone else on this forum who knows about the 'ambiguity of nomenclature's '.You sound like my old Professor at Uni but he only rode a push bike, an old 1927 Dursley or something like that 

[Trigger]

Oh OK. I remember wondering at the time because the nomenclature is ambiguous. Obviously I bought the wrong bit but... the pinch thing is separate and I reused the old one I had. It slips over the bottom of the tube, about 2cm long.

Not saying these were ever separate parts but hey, it's just a blind bit of tubing with a cut in the end. Perhaps something could be made...

Gosh, I never thought I would come across anyone else on this forum who knows about the 'ambiguity of nomenclature's '.You sound like my old Professor at Uni but he only rode a push bike, an old 1927 Dursley or something like that 

What ever you do Julie, don't ask which way round the clutch cable eye goes. 400 Boy's can be a little sensitive

[tom400f]

Oh OK. I remember wondering at the time because the nomenclature is ambiguous. Obviously I bought the wrong bit but... the pinch thing is separate and I reused the old one I had. It slips over the bottom of the tube, about 2cm long.

Not saying these were ever separate parts but hey, it's just a blind bit of tubing with a cut in the end. Perhaps something could be made...

Gosh, I never thought I would come across anyone else on this forum who knows about the 'ambiguity of nomenclature's '.You sound like my old Professor at Uni but he only rode a push bike, an old 1927 Dursley or something like that 

What ever you do Julie, don't ask which way round the clutch cable eye goes. 400 Boy's can be a little sensitive

Yes I think that was what finished bike-pusher off... 

But then again, if you look at that routing diagram in the official manual it shows you .... oh well you know 

And Julie - I did Physics at Uni. Well someone has to and us 400F riders are a broad church

[Nurse Julie]

Don't you worry about my clutch cable eye, it's totally original and looks like it's in the right place and the right way round. Make of that what you will 

[Dan]

The pinch valve stops muck / water getting sucked up the hose. The hose also provides a place for any moisture / oil from the airbox to sit in until service time when you pinch the bottom of the hose and allow the oily residue to drain out. This type of hose is also on my more "modern" '94 Gixxer and is in the service routine in the workshop manual to drain it (Its a bung rather than a slit).It's surprising how much actually comes out the hose if the bike is used regularly and you only drain the hose at service time. I guess the 400 hose would have to be not perished at all to hold any oil or water.
Dan

[martin_uk]

I previously had a 400/4 and tried to find the correct tube with pinch/duck bill type end.

I seem to remember buying one from India for a Royal Enfield, but dont remember if it fitted.

I believe the idea is that excessive pressure will open the duck bill, but if low pressure, will close bill and stop unfiltered air entering?

What size is the outlet on breather trap?

I will have a look to see if I still have.

[Nurse Julie]

I previously had a 400/4 and tried to find the correct tube with pinch/duck bill type end.

I seem to remember buying one from India for a Royal Enfield, but dont remember if it fitted.

I believe the idea is that excessive pressure will open the duck bill, but if low pressure, will close bill and stop unfiltered air entering?

What size is the outlet on breather trap?

I will have a look to see if I still have.

Thanks Martin, problem solved, I found some pipe that fits whilst out and about today. I would have preferred to have got hold of an original one if I could, but this will do just fine for the forseeable
Regards
Julie

[martin_uk]

Found the pipe, it is 10mm inside.

2015_0103armse0017 by nitram2010, on Flickr

2015_0103armse0016 by nitram2010, on Flickr