20 Most Recent 2003 kawasaki KX 125 - Page 3 Questions & Answers


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

2003 kawasaki KX... | Answered on Apr 13, 2014


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

2003 kawasaki KX... | Answered on Mar 31, 2014


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.

2003 kawasaki KX... | Answered on Jan 30, 2014


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.

2003 kawasaki KX... | Answered on Oct 28, 2013


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

2003 kawasaki KX... | Answered on Oct 15, 2013


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

2003 kawasaki KX... | Answered on Oct 14, 2013


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

2003 kawasaki KX... | Answered on Aug 26, 2013


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

2003 kawasaki KX... | Answered on Aug 26, 2013


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.

2003 kawasaki KX... | Answered on Aug 09, 2013


Release arm in engine is broke.

2003 kawasaki KX... | Answered on Jun 08, 2013


clean carb and check jets

2003 kawasaki KX... | Answered on Apr 22, 2013


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

2003 kawasaki KX... | Answered on Apr 10, 2013


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

2003 kawasaki KX... | Answered on Apr 01, 2013


hi first off you must remove all the water as soon as possible as corrosion will occure very quickly on the big end and main bearings thus you will have to strip the engine to replace them so the quicker you remove the water the better, it may be when you removed the head the water that was inside the water jackets has gone inside the engine, however you do have a base gasket under the barrel that may have torn and leaked water into the engine, it would be best if you drain all the water out before you start removing the barrel, remove the piston by removing a circlip and tapping the gugeon pin out carefully remove the small end bearing, dry this and oil it, once all this is done useing compresed air blow out the water, if no air is availabe turn the engine upside down and alow water to run out, use some wd40 and engine oil to get around the bearings and remove the exsess oil when happy all is lubricated, when replacing piston ensure correct fitment arow facing exhaust port, if no arowlocate the piston rings in corect position and fit with the locating pins at the rear, any questions ,paul

2003 kawasaki KX... | Answered on Mar 19, 2013


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.

2003 kawasaki KX... | Answered on Jan 22, 2013


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. :)

2003 kawasaki KX... | Answered on Jan 04, 2013


Check the voltage. Your batery should measure 11 or more volts, maybe up to 13 volts at rest. If is is fewer, you should replace the battery. Potentially, your battery is 10 or more years old. Battery life is typically fewer than 5 years in the best case. Your battery dealer can test your battery and more properly advise you on a course of action to follow.

2003 kawasaki KX... | Answered on Dec 02, 2012


its 120 mm or 4.7 inches from the top of the fork
Some measure the oil quantity and fill the fork up, some fill the fork up and measure the oil level. The most correct method is to measure the level, I guess, but many guys measure in quantity.. both ways work well.
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2003 kawasaki KX... | Answered on Oct 09, 2012


Try Cornwall Kawasaki's website and go onto parts diagram for your model and year, good exploded views.

2003 kawasaki KX... | Answered on Oct 05, 2012

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