New rider looking to get into the sport coming from MX, competent on a bike but have never ride trials.

I only weigh 62kg so am wondering if I should go for a 125 or go straight for a 200/250? Looking at either gas gas or beta 

 

Thanks

Beta evo 250 ideal all rounder and ideal for easy resale if you decide to upgrade

Based on your background I would say anything from 125-250 would be fine and I would side on the 200-250 side if I was in your shoes myself.  Having played on 125's plenty with my wife/daughter having one, I think you would be wanting more soon enough to start on something a bit bigger. 

My thoughts/opinion at any rate.  Good luck with your choice. 

After 30 odd years of trail riding and doing the occasional enduro (plus sport bikes etc) I started out with a 125 and that was right for me (80kg), I learned a LOT from having less power and my most loved bike (a TY175) makes about the same amount of power.  I'm not aggressive rider though, I do trials to enjoy myself rather than being competitive.