I've read so many threads like this and the overall answer is do dumbbell press and concentrate slightly more on squeezing your right pec when using a smith machine to bench press and it should even...
i had the same problem but now it is pretty much gone
what i do is use a smith machine to incline bench and always use much more of my right side to push the weight. I also focus on form and...
about an inch since i started doing them a year ago. But that said, forearms are one of the slowest growing muscles along with calves. So i train forearms more regularly and harder than upper arms....
I've been researching and training forearms for over a year now, and from i have gathered the order of importance is as follows.
1. good forearms genetics
2. wrist curls
3. CoC hand grippers