20 Most Recent 2002 kawasaki KDX 125 Questions & Answers

I DON'T KNOW WHAT A PLOT IS? BUT SOUNDS LIKE YOUR CDI..THE ONLY ELECTRICAL DEVICE THAT CAN NOT BE CHECKED WITH A METER..SO IF EVERYTHING ELSE CHECKS GOOD ITS THE CDI..HAVE A NICE DAY..

EITHER CRACKED HEAD.BAD HEAD GASKET..POSSIBLY BAD WATER PUMP GASKET..TO NAME A FEW THINGS TO LOOK FOR..

THIS QUESTION DONT MAKE SENSE SINCE THREES ONLY ONE SPARK PLUG ON A KDX 125..BUT A WEAK SPARK COULD MEAN ANYTHING IN THE ELECTRICAL SYSTEM..CDI,STATER,WIRING LOOM,CORRODED CONNECTION SOMEWHERE...ITS HARD TO SAY WITHOUT SEEING IT..AND SYSTEMATICALLY TESTING ITS COMPONENTS..

your clutch is draging adjust the clutch cable so that when you are on the bike with the bike off and in gear and clutch pulled in you can move the bike freely that means the clutch is engaged

Have you checked the engine earth from the starter motor?

you should be able to find used jug and just replace it along with new piston fitted to new jug or {cylinder}

Yup, needle valve. Even a spec of sand can cause this. Take it apart and clean or replace it. Get a new overflow hose on it as well (helps keep dirt out of the carb and directs excess fuel away from the hot engine).

KICK HARDER TRY PULL STARTING IT..IN SECOND GEAR..DOES IT HAVE ENOUGH COMPRESSION TO START?IT SHOULD START PULLING IT...START OFF WITH NO THROTTLE THAN IF NOT STARTING CRACK THE THROTTLE SO LIGHTLY AND SHE SHOULD FIRE OFF WHILE IN GEAR BEING PULLED OF COURSE BE CARE FUL NOT TO RUN INTO. WHO EVERS PULLING YOU..USE A LONG TOW ROPE..IF YOUR NOT A SEASONDED RIDER AND KNOW YOUR BIKE VERY WELL I WOULD NOT ATTEMPT THE PULL START...IF NOT CHECK YOUR COMPRESSION AND TIMING..MAJOR VACUUM LEAK MAYBE AT BASE GASKET..IS ENGINE SUCKING TO MUCH AIR? GOOD LUCK..

IF YOU DONT HAVE A MANUEL GET ONE..BETTER YET FIND AS MUCH INFO AS YOU CAN BEFOR ATTEMPTING YOURSELF..IF ITS NOT CORRECT ENGINE FAILURE WILL RESULT..GOOD LUCK..

HAYNES MANUAL..OR DEALER INFO..

DEPENDING ON WHICH SCREW WAS TURNED MAKES A DIFFERENCE..BUT RULE OF THUMB IS ALL THE WAY IN NOT TO TIGHT JUST FINGER TIGHT..YOU SEE THOSE NEEDLES HAVE A VERY FINE POINT ON THE END AND IF THEY GET TIGHTENED TO HARD THE POINT GET FLATTENED OUT AND DESTROYED..SO IN FINGER TIGHT AND OUT 1 COMPLETE ROTATION AND A 1/4 TO 3/4 OUT.BOTH SET SCREWS THIS SHOULD GET THE ENGINE RUNNING GOOD ENOUGH TO TUNE..PS..IF YOUR ENGINE DOSE NT AT LEAST ACT LIKE IT WANTS TO START ONLY TRY THREE OR FOUR TIMES IF NOT RUNNING ADJUST AGAIN BUT LITTLE INCREMENTS AT A TIME..NO THROTTLE NO CHOKE..DONT WANT TO FLOOD IT BEFORE IT STARTS..WHEN FLOODED IT WILL NOT START AT ALL..THE BEST WAY TO TUNE A CARB IS WITH A FLOW METER..

PAY ATTENTION TO WHERE THE THROTTLE POSITION IS AT WHEN THIS OCCURS .IF IT IN THE SAME POSITION EVERY TIME..YOU NEED A CARB SERVICE..IF ITS SP ERRATIC OCCURRENCE TRY USING A HIGHER OCTANE FUEL.OR CHECKING YOUR PLUG GAP.AIR FILTER CLEAN..ANY VACUUM LEAKS..ITS HARD TO ANSWER WITHOUT SEEING AND HEARING IT.. PROBABLY JUST NEEDS A TUNE UP..

Black dry deposits are indicitive of a very rich mixture. On your two stroke, rich is a asset but you can go too rich. It sounds like for some reason you're getting too much fuel.

I think I ran into something like this before on a Kawasaki 80. Check the screws that holds the choke plate inside the carb. They will come loose and allow the choke to close on you while riding the bike. If the screw comes out, it will go into the engine and cause serious damage. If the screws are loose, them out one at a time and put a drop of Loctite 271 (red) on them and reinstall them.

Check the float and the needle and seat to make sure that you don't have any trash in the needle and seat. Also check your tank vent. If the tank builds up vacuum, you could be running out of fuel. Sounds funny that you can be running rich but run out of fuel. The problem is that you run out of fuel so quickly that the carbon from the rich mixture doesn't have time to burn off.

Good Luck
Steve

Sorry, Depends on which model you have. Repost with model, and year. Thank you.

The 3 wired plug might be your headlight plug if it looks something like this '_'

clean the carb,new spark plug and do a compression test,,being that old id say it needs some new piston rings

sounds like a double earth/live wiring loom

some bikes have 2 black wires bolted to the frame 1 is earth and the other is live i know what you are thinking but it works

look for a double wire bolted to the fram proberly be under plastics by seat


John

Try this place for manuals and diagrams. http://dansmc.com/shopmanual2.htm

Hi, sounds like your gearbox needs pulling apart, not something i would recommend doing yourself, it can get very messy!!