Right , av just done my DT 400 & 250, THE 250 WAS POINTS, its now CDI, the crutial circuit to make it run, is the power from soarse coil, [ red/white- brown - black ] these plug into the corisponding 3 prong plug, on CDI .[ COLOURS MAY differ, slightly], now out the other side of CDI. THERE IS Orange- to coil, black/white,- ignition switch, black- earth,. that should get you running, the yellow & white are lights,
[ off other coil] lightimg,