Question about 2003 kawasaki KLX 125

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The bike will run with a push start, but the electric starter has a hard time starting the engine. It also will not sit in idle. It just bogs down and dies. I've cleaned the carbs and run an engine cleaner thru the system already. I know there could be a number of things needing adjustment or maybe replacement. Any ideas?

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  • kawasaki Master
  • 767 Answers

Take a compression test on the cylinder.
Check the spark plug and its gap.
Check the condition of the spark plug, is it whitish, brownish or blackish?
If its whitish means the engine is running 'lean', if it's brownish....means runs ok, blackish means its running too rich ..thus fouling up the spark plug.
Check the valve clearance too.
Since its not idling....check the intake rubber for leaks.
As also you have cleaned the carburator, recheck the jets fittings, blow the primary jet, recheck the float level if its correct.
You might too, have to reset the air-mixture screw. Its all the way in , being careful not to reach it too tight in it may damage the screw, thn trun it outwards 2 and a half turns or so....keeping the idling screw a little high and as you thn hear the engine sounding proper reset the idling to the required rpm.
Hope this helps! Good Luck.

Posted on Jul 14, 2009

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Starts, idles and runs great up 3/4 throttle. Why does it bog down after that?

Check for vacuum leaks. Spay starter fluid around intake,carb base, etc., while engine is idling, listen for change in engine idle.
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Feb 16, 2016 | ATVs

1 Answer

I have a DRZ400S, when you try to crank it it will start as long as you hold the start button down release the button and it dies.. As long as I hold the button down the start button for electric star


I presume you mean that the engine fires whilst the starter is pressed and continues to fire so long as the starter motor is keep pressed. If the engine is firing it sounds as if the electrical side of the ignition is o.k. and you may have a fuel problem. If the bike has been lying for a while it could be the carb jets are partially blocked and the carb needs cleaning. If you've just bought it check to see if the idle screw hole is still blanked off. If the plug in the bottom of the carb has been removed it is likely someone has been messing and altered the slow running jet setting. Single cylinder bikes can be a swine to start if carburation has been tampered with. Thumper Talk is a good site foe information.
Hope this helps.

Oct 07, 2014 | Suzuki DRZ 400 S Motorcycles

1 Answer

Okay i own 1996 suzuki gsxr750 now i have recently took everything off the bike to get parts painted tank,fairings, etc. while i was doing some minor things with the bike while it was completly stripped...

Bike batteries need full charge to start a bike, if there is less than full charge you can't even push start them. No click generally means no charge, the clicking sound is the solenoid working.
When you just start the bike and run it at idle, even fast idle. The battery does not get sufficient charge. What you take out of it to start it, is more than what you put back in it when you run it at idle. Bikes need to be at road speed to charge efficiently.
Also just sitting around they discharge, you may have an earth leak also. That causes your battery to discharge at a more accelorated rate than normal. If it has a clock in it, this bleeds off a small amount of power but still enough if it isn't being correctly charged.

Aug 01, 2011 | Suzuki GSX-R 750 Motorcycles

1 Answer

My bike has a brand new battery in it but refuses to turn over and start the engine. I can push start the bike but would like for it to start without trouble. Is it the stattor?

If there is excessive resistance in the path of the power being provided to the starter, it will engage but turn over slowly. But this will not rapidly drain the battery as you describe. (It will drain the battery, but more slowly than you seem to be describing, as I read between the lines.)

If the engine is very hard to turn, the starter won't be able to do the job, and will drain the battery pretty quickly. A starter motor that is energized, but is being held from moving operates electrically essentially as a piece of wire. But you can push start it, so that doesn't sound like what's going on.

It sounds to me like the starter motor itself is defective. Remove the starter motor, and have it tested.

It also is surprising that your battery is losing power so rapidly. Is it really a new battery, or just new to the bike, but having been used? It seems you ought to get at least 15 to 30 seconds of battery power even in a situation such as you describe. That makes me think: Perhaps your bike is not properly charging the battery.

Measure the voltage on the battery with the engine running at least 12 to 15 hundred RPM (motorcycles, having high-revving engines, usually don't generate full voltage anywhere near idle speed). It should be at the very, very least 14 volts, and really should be between 14.3V & 14.5V. If not, it will have the power to run the lights and so on while the bike is not running--for a while anyway--but will not have the oomph to turn the engine over, and will certainly not have any reserve.

If the voltage is low you could have a faulty voltage regulator, or alternator.

Jun 14, 2010 | 2005 Hyosung GT 250

1 Answer

Engine will not start. The bike started on Jan 2, 2010 no problem. I have left idle since in CA (not too cold). Feb. 8 I tried to start my bike and it just made a clicking sound, but didn't start. I...

Sounds like the starter, but lets check some things out ok! Usually when a stater makes that clicking noise it means there is some thing wrong with the starter, some times its the spring that engages the starter gear. First I would check the power going to the starter. Using either a test light or an ohm meter check that power is reaching the starter, now you can do this by checking the power wire on the starter while the start button is pushed. If there is power going to the starter then you know it is the starter, If no power getting there than check for in line fuses or possible relays! But my guess is that you are getting power and the starter is malfunctioning! In which case you will need to remove the starter and rebuild or replace. There is a crude procedure you can try if you'd like sometimes the starter spring sticks down after sitting, if you tap the starter on the housing some times it will free up and once the bike is running the heat will straiten it out! good luck if you have further questions please feel free to ask!

Feb 12, 2010 | 2005 Yamaha V Star Custom

1 Answer

Fault with electric start on my Suzuki GSF 250 Bandit

Check that the clutch is in, kick stand up, and neutral light ablaze. Then try your start button. When you had it running and hit the button, the starter engaged at a slower speed then the bike engine was turning, which led to the stall. The stall means your starter works. If the starter works when the engine is running then it is wiring. Check your kick stand wiring along with the clutch wires which plug in on the handlle bar or where the clutch cable enters the engine.

Oct 18, 2009 | 1995 Suzuki GSF 250 Bandit

1 Answer

HI, my bike start normally, but when engine starts for 15 minutes, mean engine is full heated. i switch off and again switch on the bike. it can not start again. i replace the complete self and replace...

measure voltage going to solenoid for power when you hit the start switch.... you should hear a small clicking sound coming from the solenoid .if no clicking... the solenoid might be going bad. maybe the starter ground wire is broken internally or its possible that you bought a defective might want to take the starter to a dealer or repair shop to insure it in good working order. the battery you have should be up to a minimum 12.6v 12v wont be enough! 13v is perfect so you"ll have to get it trickle charged up. Oh and before we go on any further, do you know how to push start a motorcycle?have you tried this yet maybe the engine cylinders is seized up from no oil lubrication...get back to me on this you need to know if the engine is seized-up! put in neutral run real fast along side of the bike then pull yourself on top of bike ,pull in the clutch push down into first gear the pop the clutch while you sit down on the seat at the same time. MAKE sure the key is on when you do this and also make sure the kill switch is set to run. if it starts then this is probably your problem ....not getting enough oil to keep it form seizing turn off the engine quick...don't want any further damage. let me know how it turns out.

Oct 03, 2009 | 2001 kawasaki ZX-12R

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