right arm significantly bigger than left

especially in the forearms. For 2 months before and since on cycle(6th week) i have been whacking it with my left hand, making an honest effort to use my left hand to pick up all dumbells etc...I have been doing reverse curls every back/bi day. I also do extra sets of curls and wrist curls on left arm only at the end of my back/bi workout. You guys have any suggestions? I have vascularity in my left forearm but it has nothing on the vascularity and size of my right forearm/bi. whatever im doing isn't working apparently.

Same problem. Only solution is to just do one arm curling. DB Curls, Hammer Curls, Cables

keep whacking with the left..............