This whip mount is designed specifically for the 2007-2010 KTM dirt bikes because they do not have exposed seat bolts.  This mount bolts up to the sub-frame where the exhaust bolts up to.  Just remove the 2 bolts that fasten your muffler to the subframe, slide the HRF whip mount in between the muffler and subframe, then reinstall the bolts and tighten securely. There is no drilling or modification of the bike of any kind.  Just bolt it on and GO!  

(HRF Billet Aluminum Flag Holder not Included) BUY HOLDER HERE