2003 kx250 why my reed petals keep going bad?

take of your carb the reed valves is at the back of that rubber moulding

Yes mate... It is hard to say without seeing the reed valve but I guaranty a dodgy reed valve will make running and tuning the bike a nightmare. Your reeds need to seal perfectly and open and close about 2-3 times a second so if any cracks, holes or damage to them then they will never seal correctly which will allow blow back through the carbi and incorrect air and fuel mix to be sucked into the motor. best solution buy a V force reed kit it replaces the entire cage and reeds just bolts in (4 bolts) I sell them for about $160 delivered, or if your know what you are doing then you can just replace the reed petals with new... About $60 ishwww.motoxpartsonline.com

Try a .162 main jet,48 power jet,carb on 3 or 4th clip to the main jet.
Some boyser power reeds might help also about atotal of 60 to 75 bucks for the whole deal and that should get you to bonzai state in no time.

hi buddy on the carb is a screw mixture screw fiddle with this screw until it revs ok and doesnt foul plugs i will send a pic when i get home nomrally you turn this all they way in and unscrew it 2 turns out

Any Kawasaki dealer can take that frame number and tell you exactly what you have providing the bike is reasonably current. They are about the only ones who have the code list. Give a dealer a phone call.

go for repsol tranmissiones and motul racing 2t oil

DOES IT STOP RUNNING BECAUSE OF A FOULED PLUG WHAT RATIO FUEL/OIL ARE YOU RUNNING
40:1 IS A GOOD RATIO NEVER HAD A FAILURE IN 20 YEARS

now then, i have a kickstart, i bought it for my kx 125 1999 but it doesnt fit it you send me the dimentions of the bolt it fits on to and the one i have will fit ill sell you it

sounds like the rings are fried and needs a new piston and rings.. for an 80 there about 110 bucks for the whole kit