1996 Yamaha XV 535 Virago DX "idle adjust screw mixture" Questions

...mixture screw. Standard procedure for setting air-mixture screw...tight it all the way in, taking care to not over tighten or the tip of the screw may be damaged, thn turn outwards 2 & half to 3 ...

idle. You can also adjust the pilot mixture one cylnder at a time, by removing a plug lead, put another plug in the cap and short it to the frame, so it wont damage the coil, and adjust the mixture as

...screw on the idle mixture adjustment screw port. At this point I don't believe it's repairable. Rear carb. What other year carbs are compatible if I look for a used one? And if I don't get the same ...