motor trials had definatly helped me in pedal trials.
i went motor trialing in the morning and i was throwing around my sherco 290 beast 2000 model so its a heffer. jumped on my pedal trials bike and it felt like nothing. everything felt easier and more controlled. it deffo helps.
if you can save up for a bike get one. so much fun. even if its just little hills. i just got to the stage where i can bunny hop up a foot or so. it sounds gay but it well hard.
get one.
simon