Looks like the previous owner put the velcro on there. That's not factory. Hard to say why he/she did that, as it's not necessary. As stated, there are plastic washers that the piece sits on, then it gets bolted down. Just guessing here, but maybe the PO tbought the assembly was going to vibrate, so they added velcro to the fender and the mount, or maybe they just had it velcroed down instead of bolted down, which is a horrible idea IMO.
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2015 Denim Black RG, FM ss ceramic coated 2-1-2 pipe, White Bros Original E Series Mufflers, FM ac, PV Tuner