The rear fender of your Harley Davidson motorcycle takes a lot of abuse on the road. Small rocks, dirt and mud are just some of the nasty things that the rear fender has to put up with on the road. Maintaining the rear fender in pristine condition can be done with the help of a mud flap. Aftermarket mud flaps come in wide varieties to choose from and will not only protect your bike's rear fender but also add flare to your ride.
Remove the mud flap template from the mud flap kit. The mud flap template has 3 rows of holes with 3 holes per row. The mud flap template has a curved end and the opposite end has a cut in the middle called the notch.
Align the mud flap template at the trailing edge of the motorcycle's rear fender. The notch on the template must be facing upwards and the template's curved end aligned at the fender's trailing edge.
Tape the diagonal sides of the mud flap template to secure the mud flap template to the motorcycle's rear fender.
Mark the 2nd row of 3 holes near the mud flap template's curved end using the centre punch tool and the hammer. Insert the tapered tip of the centre punch tool in to one of the hole. Hold the centre punch tool firmly with one hand making sure the centre punch tool is perpendicular to the fender. Strike the flat-end of the centre punch tool with the hammer to make a mark on the fender. Repeat this procedure for the 2 remaining holes on the 2nd row of 3 holes near the mud flap template's curved end.
Place the flat wooden board in between the rear fender and the motorcycle's rear wheel to protect the wheel from being accidentally punctured or drilled on. Carefully drill a pilot hole on the marked holes on the fender using the electric drill and the 1/16 inch drill bit.
Drill again on the pilot holes to widen the holes on the fender using the electric drill and the 7/32 inch drill bit.
Remove the mud flap template from the rear fender and also remove the flat wooden board from underneath the rear fender.
Insert the mud flap on the underside of the rear fender. Line up the mud flap holes with the drilled holes on the motorcycle's rear fender.
Insert the cap screw from the mud flap kit in to the drilled hole on the motorcycle's fender and through the hole on the mud flap. The cap screw is a bolt with a hexagonal slot on the cap screw's head.
Insert the flat washer in to the cap screw's threaded part. The flat washer is a flat, circular disc with a hole in the middle.
Screw the cap screw's nut on to the cap screw's threaded part using your hands to tighten the nut.
Repeat Steps 9 to 11 to install the 2 remaining cap screws, flat washers and nuts to the rear fender and through the mud flap.
Tighten the cap screw's nut using the socket wrench with the appropriate size socket to secure the mud flap to the motorcycle's rear fender. Insert the hex key on the cap screw's head and hold the hex key firmly to prevent the cap screw from turning as you tighten the cap screw's nut with the socket wrench. Repeat this step to tighten the remaining nuts.