My new projekt/bike 55 SQ 4 MK ll

[Paul_Linden]

Mine looks like this, although now it has a longer copper pipe as the oil was foaming and getting in to the pipe.

[rschurr]

Thanks Paul,
that explains a lot, a thread is already there, so just need a fitting and the pipe
Rudy

[roger.fellows]

Somewhere on the forum is Paul Jameson's version of the breather - enlarged aperture and repositioned end - I didn't bookmark it but should have.

[rschurr]

Thanks, Roger
found it!?
viewtopic.php?f=4&t=222&p=14218&hilit=Mk+II+Breather+pipe#p14218
Cheers Rudy

[chris.shearwood]

Thanks, Roger
found it!?
viewtopic.php?f=4&t=222&p=14218&hilit=Mk+II+Breather+pipe#p14218
Cheers Rudy

Hi Rudy,
I don't think that is the thread that Roger was talking about. The one you have found is a breather mod for an iron motor Sq4.
Regards, Chris

[rschurr]

Oops they all look the same to the Rookie

[roger.fellows]

Hi Rudy, no that's not the one I meant. I'm not sure that there was a photo of Paul's modification. I'll do a bit more searching today, but we could do with Paul's input.

[roger.fellows]

Hi again Rudy, sorry no good with quotes on here, but I've found the one I meant.

It's a Paul Linden topic 'Oil escaping from a rebuilt square' original post Tues 12 April 2016 and page 2. Useful inputs from several people including Paul Jameson.

If you check out the 'breathing' article in the knowledgebase on the club website there is mention of a breather box fitted to a Ducati (I think). I've acquired one, it has a sort of reed valve built in, various inlets probably because the Ducati has breather outlets from the rocker boxes. I like the idea of fitting a catch bottle, if only to see what would otherwise end up on the road - but I might be some time ...........

[rschurr]

Hi Roger, yes now I found it, thanks again.

Since I installed the Morgo I see in cold weather

(and here in Bavaria is currently a siberian cold !)

a continuous stream of (foggy) air coming out from underneath the breather tube (but still no oil).

So had to wait for warm weather and a really warm engine to decide what to do.

Regards Rudy

[Bob.Murphy]

a continuous stream of (foggy) air coming out from underneath the breather tube (but still no oil) Rudy

I had the same copper pipe 'mod' in my square back in 1970 (but with the Marzak gear pump, Morgos hadn't been invented).

After a fairly hard run of 50 miles or more, while sitting at traffic lights, I always had a plume of vapour blowing out of the neoprene breather pipe attached to the copper pipe.

And that was in the summer .

It sounds normal to me.

We probably pushed our bikes harder back then - they were just bikes rather than investments. In 1971 I remember Graham Berry peering over my shoulder from the back while we were heading to the Ferry at Harwich saying "What speed are you doing??"

"85".

"Bloody Hell - you don't half thrash your square".

It stood up to it with regular maintenance and very frequent oil changes .

Bob.