Iv'e recently put on a kmx z610hx onto my new mod build and its been nothing but trouble. iv'e only ridden the bike round to get used to it, not actually using it for proper trials use and its constantly stretching and i'm considering replacing it already. i know its definatly the chain stretching rarther than the wheel slipping forward in the dropouts cos the brakes still work perfect. i've only used it for 1 hour riding time so far aswell, surely this isnt right