I am getting back into riding after a long layoff and need some input on the right bikes for my son (10Yr) and I. I have been looking at the TTR's, 125 for him and 225 for me. What is your thought? I think the 125 will work well for him to learn on, but will the 225 provide me with good power? We will spend most of our time in the woods instead of on a track.