Stomp is such a good make and WPB is made by stomp and stomp are amazing bikes and better is the super stomp but with welsh pit bike crf 70 frame and its a good brand but if ur budget is £550 if i was u new demon x 140
www.cokermoto.co.uk is on offer new model for £550 it wont be fast unless u want it to be better be safe and get a 140 mate and if it too fast anyone with a 125 would wanna upgrade thanks