I'm completely new to trials and I'm looking for my 1st bike. As a fairly big guy - 250lbs, 6'1" - I'm thinking I would need a larger bike. However a friend of mine said that as a novice, I'd find a small bike much easier to ride and handle and suggested that I start with something like a 125. Is this crazy or is my buddy right? Would a good 125 really be able to haul me thru a section? Or should I shoot for something like a 250 - 300?