I own a 1998 kx 125[/b] that has been stalling after a few seconds of idling i have been asking around and a few people told me it was my gas mixture so i changed its gas. Another person told me it was the spark plug so i changed that but it still kept on fouling them. i also cleaned the carberator. i cant find out whats wrong with it.

 

Check and make sure none of your vent tubes on the carb are clogged or pinched. Had a similiar problem years ago on of my dirtbikes.

 

ill try that could it be that i need the top end rebuilt

 

could be your air screw......
Kenny

 

i would say that its the top end....what is the compression like and does it run at all when you rev it? usually when your top end goes the bike wont idle good or at all.......

 

wen i get it to turn over it revs a little but if i rev it too high it stalls and i dont think the compresion is too good. i need piston and rings for a top end change right

 

yea....piston, rings, circlips, and wrist pin. They should come together in a piston kit from wiseco or whatever brand you get. Oh yea and a top end gasket kit too.
Kenny[img]i/expressions/face-icon-small-wink.gif[/img]