2003 kawasaki KX 125 - Answered Questions & Fixed issues

jet size and exhaust muffler are not connected failing at high rpms indicates a problem coil or capacitor or failing ignition control module if it has points or cdi ignition it could be from worn shaft that is wobbling at speed causing the miss

Check VIN location at this page: http://vin-location.com/

usually 2 strokes foul plugs when the oil is two strong in my old bike i mixed the gas 40:1 try that and if it dosent work i would take it to your nearest dealer and get them to check it out

Check the timing it should be set at top dead center or a hair before top dead center, the other issue could be it's not pulling fuel which would mean it needs a good carb cleaning

Should be 2-3 screws on the side of the tank plastics undernieth the decals.

Could be the power valve is dirty or blocked from operating. May be a carburetor problem too. Has the carb been cleaned lately?

Hi, I am confused, your problem question banner shows the year as 2003 for your Kwaka. Vin number is normally for the frame/chassis. If you look around the engine you should see a stamped/etched alpha numeric code. If you call Kawasaki they should be able to tell you the details regarding this code.

You have to adjust your idle screw on the side of the motor ...it should be by your carb. Turn your bike on and then turn that screw to the left until your motor calms down and has the correct idle speed.

Service your carb.I think you will find your pilot jet is blocked.

If your bike has shift indexers they could be out of adjustment.

i got kx80 and dont no the year cud u help me frame kx080L-004594 engine kx080EE049741

check your VIN number! The eighth number will tell you what year your bike was produced.

check and make sure choke is opening all the way,if it is only opening part way could explain why you don't need to use choke at all to start and then at higher rpm's it is not getting enough air causing it to basically choke it self out.

Release arm in engine is broke.

clean carb and check jets

try putting some pb blaster around your shifter shaft or check to see if the shaft or shifter is stripped

it runs but sputters.that can be 2 things.First idd your sparkplug cap has had it (get a new 1 from the parts store)2nd it could be that your getting to much fuel in top end of your revband.easy to check just run your bike a few min with a new sparkplug and look at the color.Wite is not enough fuel.Brown is perfect mix.black is to much oil and if black and wet its to much fuel.try this test and maybe you'll find it

No u can't.

check for spark and replace it if needed. The carb might be plugged up from sitting awile or gas whent bad. try fresh gas and u might have to take carberator off and clean it out.

How did you get on with FTjoes fix? That would be my first thing to do, dont forget to take out the jets and give them a blow through, then treat the bike to a new plug if you haven't already. :)