https://www.youtube.com/watch?v=Clc66wQ8xIk
Here is an entertaining video showing how the centre stand bumper is relocated when the SP Tadao Power-Box exhaust is installed. It doesn't look that difficult to come up with a similar bracket to allow the centre stand to retract more fully with the Yoshi exhaust.
All accessory manufacturers should provide such videos...even in Japanese, it is easy to follow the intent.