Yes the MC18 has a single solenoid for both carbs. (Later models have one each). Its mounted top right of the picture on a bracket it shares with the rear ignition coil.
Internally it is in good condition and moves freely. The question is if all the electronics that operate it are good.
and I only lost the spring once.
When I last took off the tank one of these hoses had disconnected itself. So I updated the clamps on the loosest ones and did my best to route as the diagram suggests…..
which to be honest...I'm not sure reflects the plumbing of an MC18...but I think I've got it as it's supposed to be.
Next step....coffee at my second favorite place with the air box top off...
Last edited by Hudtm60 on Sun Feb 08, 2026 8:07 pm; edited 2 times in total