I had a friend help jet my bike like 4 years ago...took a look at my set up today and notice a couple of oddities...it is a HRC jet kit FYI. Here are the questions:

The + air solenoid on my bike is black and not red? It also has all four tubes connected. So I assume we did not have or use the correct solenoid? Were they all red? I assume he never changed it?

My "Y" joint looks very much like the one in the photo...how would I tell if it is still the stock piece? Mine still has the white paint marking on them.

Any info appreciated.
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'93 MC21 250sp Repsol "Doohan"