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Breathers

Posted: Sat Oct 24, 2026 11:06 am
by michael4
There is plenty of info here about breather systems but none seems to cover my set up. This leads me to believe it is not 'original' but I'd like to know whether it is doing the job adequately.

1098 engine, 1275 head, standard carb.

I have a standard metal pipe running from the tappet chest cover to the flame trap (fitted with a new scouring pad) and from there a rubber pipe runs to the air filter casing entering it between filter and carb. There is also a vented oil cap.

There is no breather pipe on the rocker cover and no provision for a valve on top of the inlet manifold.

Would this be described as 'OK'?

Re: Breathers

Posted: Tue Oct 27, 2026 11:33 pm
by svenedin
It isn't standard but it should work well enough. Is your engine leaking oil from the rear scroll? If not, it would seem your set up is adequate.

Stephen

Re: Breathers

Posted: Wed Oct 28, 2026 10:38 am
by michael4
Thanks,

It drops a couple of spots on the garage floor but nothing significant or worrying.

Re: Breathers

Posted: Wed Oct 28, 2026 2:18 pm
by svenedin
michael4 wrote: ↑Wed Oct 28, 2026 10:38 am Thanks,

It drops a couple of spots on the garage floor but nothing significant or worrying.
That's completely normal. The scroll only works when it is turning so a few drops on engine shutdown is to be expected.

Stephen