Yes it will fit, I have a 98 carb and my 86 model kx125
The carb bowl drain nut is located on the bottom of the carb.
120 main jet on a 28mm carb
You will need to go into your settings to change them. If you are having difficulties, it is best to let a mechanic do the work.
snug them don't tighten them
mine had a 2 barrel carb and had 125 hp with the 350
125 with a carb or TBI, 175 in magnum MPFI form
there is a nob on the carb just play with it until you get it adjusted
take the carb out give it a clean if not then the air filter lol
will a 110 carb make a 125 pitt bike go slower
play with the carb and or change the plug gap accordinglly?
The 125 S