Tell you what I'd be doing. buy two of these tees and either set up a dual feed or just cap off the one tee.
By the way, what are those tees spec'd out for (which Yamaha) I just might pick them up myself.
Thanks
Kawboy
Post Script editing
Check this out. I'll be pulling the tees and crossover fitting from my carbs and measuring up for these.
Search EBay for this "Kawasaki Carb Crossover Fitting /Aluminum KZ1000 Kz650"
and this " Kawasaki Carb Fuel Tee,Pipe /Alum Z1,Kz900, Kz1000 '73-'81 " (can't get the http link to go in)