If you ride your ktm in the dunes you are required to have a flag on your quad. The stock mount for this is under the plastic on the left hand side of the grab bar. My buddy cut out the marked hole for this mount but the first time he rolled his quad over his plastic cracked from the hole to the back edge of the fender. I found a clamp on cb antenna mount at a truck stop for $19.99 that works perfectly on the rear grab bar and I didn't have to cut a hole in my brand new 525. After 4 days of hard dune riding/jumping it was still going strong. never came lose, never moved.