samylad

I HAVE GOT A 2002 YAMAHA DT 125, I HAVE HAD IT FOR ABOUT 3 WEEKS, LATELY WHEN I HAVE BENN PUTTING IT INTO FIRST GEAR IT JUST CUTS OUT INSTANTLY, AND ALSO WHEN IM IN ANY GEAR AND IT WILL CUT OUT IF I DONT KEEP THE REVS UP. ANY SUGGESTIONS ON WHY? THANX