Got to looking at my 02220 KDX this morning. Noticed a small hole at the back of the swingarm on the top side (sprocket side of the bike). It was a 7/64 hole that was factory drilled out. That was the only place on the swing arm. On the bottom side opposite the top hole, there is an indent in the casting but no hole. The indent is the same size as the 7/64 hole on top. On the brake side of the swingarm in the same location there are indents on the top and bottom, but no holes. Am I suppose to drill out these impressions in the swing arm to let water and crud drain out of it?