SU cold start pipe identification

[RALPH M]

What is the function of the pipe in the attached image on the SU cold start solenoid? It must connect to something but what.

Thanks Mike Ralph

[JoeF]

It delivers the rich fuel mixture, for starting, into the inlets via the balance tubes - there is a hose, two jubilee clips and an adapter on the head. Your pipe looks modified though - I don't know what the small pipe added to it is for.

[RALPH M]

That’s really useful. Many thanks. What source did the diagram come from?

Mike

[JoeF]

The diagram is from the Spares Handbook for the 400. A pdf of the whole spares book is available in the archive section of the BODA website.