Question about 2003 kawasaki KX 125

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Only runs with choke on, when throttle applied motor dies. 99 Kawasaki 125

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 3567 Answers

SOURCE: kawasaki ke 125 runs for about 2 minutes stalls

Go to the dealer and ask for the stock plug for your bike. Check for spark on the new plug then install the plug.

Remove the carb , dissemble it and clean the varnish out. Remove the petcock, ( gas valve ),water trap and clean it out. Next let one cup of gas flow into a container. Any water or rust in the bottom of the container? If any rust was in the water trap or the container then purchase an inline fuel filter to eliminate the rust getting into the carb.

If cleaning the carb yourself does not do the trick then take it to the dealer and have them clean it and install a car kit. This should eliminate the carb as a problem. Get a new air filter and install it.

Now you have spark, gas and air. If it still will not start it is likely that you need new crank seals. On a bike that old you may well need new crank bearings as well.

Please rate this solution. Thanks!

Posted on Mar 22, 2009

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adnanbhatti
  • 1188 Answers

SOURCE: bike only runs with choke on or giving it

There are two possible solutions:

1. If you are sure the engine is OK then you can increase the throttle screw to increase idle race. The throttle screw can be found where the throttle wire connects with the carburetor.


2. If the bike is old or if you have not changed the engine oil on time then the bike needs piston ring replacement. This should be done as soon as possible to avoid more engine damage and effect savings on cash.

Posted on Aug 09, 2009

ollie reece
  • 1167 Answers

SOURCE: 2006 kawasaki 750 vulcan will not idle , will idle with choke

ok buddy on the carb will be some sort of screw and idle screw turn this in 1/4 of a turn with the machine running until it idles at 1000rpm also the choke will stall the engine when warm the choke is only for cold starts get back to me more info or problems f4d68ca.jpg

Posted on Sep 24, 2009

  • 13 Answers

SOURCE: Engine dies when choke is taken off or when throttle is applied.

where the valves set cold or hot? could make the world of a difference...is there intake leaks? bad floats perhaps....its a problem that will take some time cancelling out problem by problem

Posted on Oct 09, 2009

  • 440 Answers

SOURCE: I have a 2001 kawasaki 125 eliminator shuts off

If it dies when put into gear then its the side-stand switch (stand is down or switch not working)
If it dies when the clutch lever is released then either it was released too quickly with not enough revs, the engine doesnt have enough power to pull away or possibly the clutch switch is working in reverse

Good Luck
Hope this helps.
(If it does then please mark this as 'useful')
Ride Safe
Bike-Doc

Posted on Jan 29, 2010

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If you have a choke you have a carb(s). If it will only run on choke the low speed circuit is likely dirty/plugged. If it will run at medium or higher throttle on choke only you may have further carb pluggin gproblems and/or a plugged fuel filter or pinched line etc.

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I would check the compression of the piston, the rings could be stuck and not have good compression. It should show 120 psi or more. Also can pull off the exhaust and look in the exhaust port to see the rings, piston, and cylinder walls. If the motor has a power valve make sure that is not gummed up or stuck. Mark C

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Check that the choke and throttle adjustment are synced correctly. It sounds like what happens when the choke is coming on too early in the throttle application (choke applied when in the non choke full throttle start detention). I don't have the exact method without looking it up....something like this-a pin goes through a hole in the throttle bracket to line up the throttle and choke together while you make the cable adjustment. Your engine manual should give the procedure. If that doesn't take care of it then suspect worn needle and seat on the carburetor.Hope this helped Tim

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Be certain the battery is in good condition. Install a new spark plug. Clean the carb and air filter. Use the throttle sparingly. The carb has a power valve that gives an extra shot of gas each time the throttle is twisted. Too many twists and the engine floods out. Please rate my answer. Thanks!

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1 Answer

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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.

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Won't idle without choke, turn throttle boggs out


have u checked the float hight on the carburator? also make sure ur choke curcuit i clean and free of dirt

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2 Answers

Engine dies when choke is taken off or when throttle is applied.


where the valves set cold or hot? could make the world of a difference...is there intake leaks? bad floats perhaps....its a problem that will take some time cancelling out problem by problem

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