Yamaha R1 carbs on a Pinto.
Someone on this forum has done an excellent article on the above (sorry that I can't name you but if I go out to look it up I shall probably not get back in). I have bought a set of carbs off a R1. They are Mikuni 40mm CV stamped 4XV. There are several attachment points for tubing but no tubing. From the article I found the Yamaha R1 Workshop Manual and by using that I have identified Petrol inlet (1 point), Float chamber vent outlets (2 points) Vac Chamber vent outlets (2 points). I am still left with 1 pipe on carb 1 and 1 pipe on carb 4 that look as though they should have tubes attached. They are connected through all 4 carbs so if I blow into 1 pipe I can feel the air coming out the other end. The pipes are different diameters, 1 small (about 3mm) and the other about 10mm. If I was working with a carb on a classic car then I would say that the small pipe is a vacuum takeoff for a tube to go to the Distributor to operate the Vacuum Advance and Retard.
I will attempt to attached 2 photos showing the unidentified pipes. Can someone tell me what the pipes are for, do they need tubes attached, where should the tubes go to?
If I can't attached the photos could someone answer this to tell me how to do it.