How do i adjust the idle on my 1995 yamaha virago 1100 cc motorcycle?

On most bikes and four wheelers, this is done by a throttle stop. the position of the stop is usually adjusted by a screw. Remove the tank. turn throttle and see what moves by the carb/ injectors. When you return throttle to idle, the moving piece will come to rest on the throttle stop. You can now adjust its position by turning that screw.