Tao Tao 125d has Drive, Nuetral & Reverse, won't go, shifter real easy to shift, gear light indicator works but just won't go, tried adjusting clutch but didn't fix anything, any ideas as to what it might be ?

 

if the shifting linkage is intact from the handle down to the gearbox, i think it may be in the gearbox on the shifting cluster/drum. is it "free" or "floating"? find the FNR switch. the linkage may tell the shifter position without the gearbox changing.