hi to all , i am new to this site and new to trails , i have bought my self a beta rev3 250 , i have joined a club , and have been out on my bike twice , first time was a bit tiring , second time i had a blast , but on my second time out towards the end of the day , i noticed my front wheel was sticking and would not let me steer the bike properly , i got home and jet washed the bike and calipers , but the wheel was still sticking , i have removed the caliper and the wheel is now rotating properly , i have noticed my pads are a little low, so i have now replace the pads but my wheel is still sticking , i believe the pistons are not running freely , i have emptied the brake fluid and replaced with new dot 4 , but the wheel is still sticking , can anyone advise me on what to do next as im not the best mechanic , any advice would be great , and thanks for any replys , cheers tony