Hi OH Rider,
The Radiator Guard is fitted without removing any of the plastic.
For the Downpipe Grille, the black triangular section of plastic has to be removed
from around the opening in the lower fairing, and the Grille is fitted behind that.
Attached below is a copy of the fitting instructiions for both of these accessories -
( You will get paper copies with the parts )

Cheers,
