I have an 80 Yamaha XS850.
I happened on a set of 79 XS750 Mikuni MKII carbs.... (same carbs as a 79 XS1100)much better than the Stock Hitachi ones.
But.... Here's my shot in the dark.
They were corroded so bad that the aluminum was like putty.
So if anyone has a set or has access to one.......
Please let me buy it from you. Please??