Welcome Doug to the forum, glad you joined us
Yes, if you are going to keep the fender's on you will need to reinforce them. The vibration will break the mounts that come with it.
Here is a link for you...http://motorbicycling.com/f11/front-...cycle-289.html
Here is another good read.....http://motorbicycling.com/f30/bicycl...-care-354.html