20 Most Recent 2003 kawasaki KX 125 Questions & Answers

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

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?

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

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 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