i need some advice.i'm new to the sport and belong to a mc club with a great track .i also have a small track on my farm to practice on(14 jumps,50' table top).my problem is just when i am gaining confidence i do something stupid.right now i'm healing a cracked tailbone.is there a video or book on techiniques.i love the trial and error method but being 47 it is taking too long to heal up.also i ride a rm250 would i be better off with a 125.i am big compared to most riders(215,6').