Top 20 2003 kawasaki KX 125 - Page 5 Questions & Answers

Do you have a rim strip to protect the tube from the spokes? Is the rim damaged from tire irons or a sharp burr where the tube might contact it? A broken or missing spoke? Did you take a rag and wipe the inside of the tire to look for sharp objects? After the rag did you feel around with your hand ? You do have to be very careful not to fold over the tube or pinch the tube with the tire iron, the tire bead, or the rim lock.Maybe you are running to low of an air pressure for the type of riding (jumping) you are doing. Maybe the brand of tube you are using is too light of a duty for off road riding.You may want to check into the heavy duty tubes available for off road use.

u might need a new top end

hopefully u put the rite size rings n piston in--du u hav proper libricant in case-what that model calls for--how is the cam chain tensioner @ correct value--du u have a shop book like clymer etc

there is not much to adjust. Leave the float levels alone, they are set at the factory, leave alone the sliding needle adjustment too. All you have left, is an idle screw, and an air screw. adjustment for the air screw, turn all the way in till it stops, then 2 full turns out. mabey more , mabey less, listen for best idle. Then adjust your idle speed, thats it.

anytime u deal with bottom end work it takes precision-did u open case up?

32:1

if you have all the electrics for the newer motor a would run the bike with them

Take off fuel tap and check if worn and If there is a diaphram check it for holes.

when your putting the barrel back onto the piston start lowering it down. when you lower so far swing the power rod into posistion cause you cant fit it after you have reinstalled the barrel. hope this helps just fitted a new piston and rings on ma kx80 and a had the same problem lol

first drain the carby, then set your air mixture screw 2 turns out, from the fully turned in position. The starting proceedure is as follows, when the engine is COLD, turn on fuel, pull on the choke fully, and kick the engine over. DO NOT use any throttle, when the engine is cold, and the choke is on. Remember Choke on, NO throttle.
When warm, no choke, and a little throttle when kicking.

strip the carb down, check the float level it mite be out also check for a blocked jet. its got tobe one or the other that is wrong to cause fuel to overflow. hope this helps

usually about 32to1 but i would recomend going a little richer and using a good resisted plug

Hello you have a
1. fuel starvation problem clogged carburetor jets.(clean the carb)
2. Intake leak carb joint/intake manifold.( start your motor get it to idle best you can spray wd40 around the carb joint if the rpms change you have a leak replace the carb joint or gasket/o-ring as needed.
3. crankshaft main seal magneto side leaking or worn main bearing.
check end play on the magneto side remove the cover plate firmly grab the end of the shaft with up an down motion if you can feel it move replace the main bearings and seals.
These are problem that will cause your motor to run lean and hesitate.
Hope this helps you with your problem

check the carb float and the float settings. also clean all the jets out. check the joke aint sticking. check the condition of the air filter for rips or holes as that would explain why the bike is bogging when reved

it is for the throttle position for the cdi unit to know if the throttle is open or closed and by how much.

i believe that model quad, like many smaller kid quads, have an electronic choke. sometimes the electronic choke valve stick. try unplugging it from the connector or tapping on the side of the carb with the back of a screwdriver, that sometimes work. or you might just have to replace the choke.

Check every electrical connector for corrosion / oxidation or loose fittings also check your engine stop switch.

Unfortunately it is never possible to find out the cause, it is not very common, but does happen. For this reason when doing work on the piston it is recommended to always use new circlips.
Even then it may be the installers fault, or a damaged clip, or the groove in the piston not machined exactly.

I can give you reccomended Team Green setting for your weight, dirt bike setting are usually based on weight,

sounds like you need to rejet the carb..