Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: Athame57 on September 11, 2018, 03:20:54 AM

Title: Drain tube
Post by: Athame57 on September 11, 2018, 03:20:54 AM
I'm about to fit the oil drain tube I've acquired that goes into breather collector box that goes under the air box.  It came with a sponge in the wide end, I'm not sure this stays in or is just part of the packaging....ding dong ...?
Title: Re: Drain tube
Post by: Nurse Julie on September 11, 2018, 09:04:21 AM
Its just packaging, when you take it out can you send it to me as mine is missing  ;D ;D ;D ONLY JOKING....leave it in, it's a moisture trap.
Title: Re: Drain tube
Post by: Athame57 on September 11, 2018, 09:48:13 AM
Thanks Julie...you're a gold mine of info!!
Title: Re: Drain tube
Post by: paul G on September 11, 2018, 01:00:39 PM
Its just packaging, when you take it out can you send it to me as mine is missing  ;D ;D ;D ONLY JOKING....leave it in, it's a moisture trap.
;D ;D ;D
Title: Re: Drain tube
Post by: K2-K6 on September 11, 2018, 05:17:36 PM
 :)

Made me laugh too.
Title: Re: Drain tube
Post by: taysidedragon on September 11, 2018, 08:25:13 PM
Its just packaging, when you take it out can you send it to me as mine is missing  ;D ;D ;D ONLY JOKING....leave it in, it's a moisture trap.

Which end should it be in? (feeling nervous asking that of a nurse!)
Is it an alternative to the trap at the bottom end?  :o
Title: Re: Drain tube
Post by: Nurse Julie on September 11, 2018, 09:06:48 PM
Its just packaging, when you take it out can you send it to me as mine is missing  ;D ;D ;D ONLY JOKING....leave it in, it's a moisture trap.

Which end should it be in? (feeling nervous asking that of a nurse!)
Is it an alternative to the trap at the bottom end?  :o
Trust me, I'm a Nurse, I would never advocate sticking something in the wrong end 😀😀 If I remember correctly, originally the tube fitted to the bottom of the air box had an end with a slash cut when the bike was serviced, the end of the tube was squeezed which let out any moisture that had built up. These days, I don't think the slash tube style tube is available any more so as an alternative they supply a pipe that was fitted to the bottom of  the expansion box as an alternative, which has foam inside the wider part at the top. But,you have to take it off to squeeze the foam, so a bit difficult really.
Title: Re: Drain tube
Post by: taysidedragon on September 11, 2018, 11:24:24 PM
Its just packaging, when you take it out can you send it to me as mine is missing  ;D ;D ;D ONLY JOKING....leave it in, it's a moisture trap.

Which end should it be in? (feeling nervous asking that of a nurse!)
Is it an alternative to the trap at the bottom end?  :o
Trust me, I'm a Nurse, I would never advocate sticking something in the wrong end 😀😀 If I remember correctly, originally the tube fitted to the bottom of the air box had an end with a slash cut when the bike was serviced, the end of the tube was squeezed which let out any moisture that had built up. These days, I don't think the slash tube style tube is available any more so as an alternative they supply a pipe that was fitted to the bottom of  the expansion box as an alternative, which has foam inside the wider part at the top. But,you have to take it off to squeeze the foam, so a bit difficult really.

So a push fit plastic plug which can be removed to let moisture out instead would be ok?
Title: Re: Drain tube
Post by: Nurse Julie on September 11, 2018, 11:37:54 PM
Its just packaging, when you take it out can you send it to me as mine is missing  ;D ;D ;D ONLY JOKING....leave it in, it's a moisture trap.

Which end should it be in? (feeling nervous asking that of a nurse!)
Is it an alternative to the trap at the bottom end?  :o
Trust me, I'm a Nurse, I would never advocate sticking something in the wrong end 😀😀 If I remember correctly, originally the tube fitted to the bottom of the air box had an end with a slash cut when the bike was serviced, the end of the tube was squeezed which let out any moisture that had built up. These days, I don't think the slash tube style tube is available any more so as an alternative they supply a pipe that was fitted to the bottom of  the expansion box as an alternative, which has foam inside the wider part at the top. But,you have to take it off to squeeze the foam, so a bit difficult really.

So a push fit plastic plug which can be removed to let moisture out instead would be ok?
No reason why not, its not as if by plugging the hole, pressure is going to build up or anything like that. I suppose in reality, it wouldn't matter at all if nothing was fitted, it is only a drain at the end of the day. I suppose the foam originally stopped road dirt going up the tube.
Title: Re: Drain tube
Post by: taysidedragon on September 11, 2018, 11:56:00 PM
I don't want to leave it open in case water spray and road dirt get sucked up inside.  :(
Title: Re: Drain tube
Post by: Laverda120 on September 13, 2018, 05:57:47 PM
I remember my original 400/4 back in the late, late 70's had a thin piece of foam fitted between the two gauze plates in the base of the air filter housing? Is this an additional piece of foam to do the same job of keeping moisture out?
Title: Re: Drain tube
Post by: Athame57 on September 13, 2018, 06:09:38 PM
Laverda....I tried very hard to get it but it isn't out there anymore. The US forum advised me to plain cut out a a piece of scotch brite and so I did.
Title: Re: Drain tube
Post by: Nurse Julie on September 13, 2018, 06:47:28 PM
I remember my original 400/4 back in the late, late 70's had a thin piece of foam fitted between the two gauze plates in the base of the air filter housing? Is this an additional piece of foam to do the same job of keeping moisture out?
The peice of gauze in the panching plate, I think that's how you spell it, filters the oil from the engine blow by gases and recycles them through the carbs. I use the foam part of a kitchen sponge, always have done.
Title: Re: Drain tube
Post by: K2-K6 on September 13, 2018, 06:48:24 PM
I don't know if it's the same function,  but some of the bikes a little later used a clear tube with a bung in the end of it.
At service interval you'd inspect for fluid and drain as appropriate,  it looks like it's to stop fluid exiting in front of the rear wheel,  or to stop it dripping and so look like a brit bike had been parked there if stationary  ;D
Title: Re: Drain tube
Post by: petermigreen on September 13, 2018, 06:56:10 PM

The peice of gauze in the panching plate, I think that's how you spell it, filters the oil from the engine blow by gases and recycles them through the carbs. I use the foam part of a kitchen sponge, always have done.

So do I, cos Julie told me to! :o
Title: Re: Drain tube
Post by: Nurse Julie on September 13, 2018, 07:10:41 PM

The peice of gauze in the panching plate, I think that's how you spell it, filters the oil from the engine blow by gases and recycles them through the carbs. I use the foam part of a kitchen sponge, always have done.

So do I, cos Julie told me to! :o
Good Boy Peter, you know it makes sense  ;D ;D ;D
Title: Re: Drain tube
Post by: taysidedragon on September 13, 2018, 09:20:53 PM
Just a small issue that might confuse people.

I call the black plastic box connected to the back of the carbs as the air box.
Where the air filter lives is the air filter case or box.

Some people seem to be calling the air filter case the air box. Am I right or are they?

Confused 😕
Title: Re: Drain tube
Post by: Nurse Julie on September 13, 2018, 09:35:02 PM
I call the black plastic box connected to the carbs the air chamber and the box which contains the filter, the air filter box.
Title: Re: Drain tube
Post by: Athame57 on September 13, 2018, 10:57:22 PM
Guilty as charged!