On the '18 the arm can be moved though 180deg to give race shift and still clear the side stand.

As the '21 isnt like the RS250 and is more of a road bike compaired to the '18 you can't run race shift unless you..

a, remove the side stand

b, get the HRC footrests and arm

c, do what Andy says

d, make it hand change
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If I have to take the carbs off once more...