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When I run my KMX 125 for a minute it overheat. My mechanical water pump seal is new. What is the cause of overheating?

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There may be a clog in the system preventing good coolant flow, also is there coolant in the system?
i would try and flush the system

Posted on Nov 27, 2014

Testimonial: "I bought my KMX old. I found out that the last owner of the motorcycle used water instead of coolant. So I changed it and use a coolant. Does the radiator also the reason of overheating?"

  • Kristine Ventenilla
    Kristine Ventenilla Nov 27, 2014

    "I bought my KMX old. I found out that the last owner of the motorcycle used water instead of coolant. So I changed it and use a coolant. Does the radiator also the reason of overheating?"

  • sidewinder77 Nov 27, 2014

    check the radiator cap
    Is there a thermostat in the system if the thermostat is stuck in the closed position you will not have coolant flow



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Hi I have a 93 mercury villager mechanic replaced water pump and belts but dnt think thy timed it wen I picked it was thn wen I brought it it first gt hot again then was driving engine shut down

Before entirely blaming the village mechanic I would guess the water pump was probably not the only thing wrong and either the failing water pump caused another fault, made another existing fault worse or perhaps wasn't the original fault causing the symptoms.

Water pumps are very reliable and mostly only two things go wrong; either the bearing begins to fail and becomes noisy or the seal wears out and they begin to leak. Mostly these two things happen together but neither prevents the pump from pumping as long as the coolant level is kept topped up and so overheating and other symptoms cannot directly be caused by the water pump.
There have been a few isolated cases of the pump impeller falling off but that is very rare and something I have seen only once in forty years.

If a leaky pump caused the coolant level to fall significantly the engine could overheat and it is that overheating that tends to cause subsequent symptoms that need further diagnosis.
Overheating can shift large quantities of sediment from the engine block which can block a radiator. Overheating can damage thermostats, sensors and cylinder head gaskets. A damaged cylinder head gasket can soon cause lots more symptoms and eventually write-off and engine.

It is possible your village mechanic didn't time the engine correctly but on the face of things all he is guilty of is not testing the car thoroughly enough after his repair. Often this is caused by a lack of good communication between the owner and repairer.

Dec 03, 2015 | Mercury Cars & Trucks

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Why is it overheating kawasaki kmx 125 during trail

maybe caburetor air/fuel mix is lean, or maybe the water temperature valve dont open when hot. water pump maybe dont work, refrigerant liquid level too low. check all

Apr 29, 2014 | 2001 kawasaki KMX 125

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1988 KMX 125 leaking oil

Hi, 01495718350 external oil deposits fall into 3 categories:
1. WEEPAGE is oil that is sweated pass gaskets, seals, o-rings, and crankcase seams, it's covered by dry dust and is normal for older engines with lots of miles, no repair is necessary.
2. SEEPAGE is the same as weepage except the deposit is wet and confines itself to a specific area, repair is optional depending on the owner's cleanliness criteria, the deposit location and the weight of his bag of "DRACHMA"
3. LEAKAGE is the same as seepage except it is enough to drop to the ground leaving a spot. Repair as necessary.
To find the source of your oil leak, start at the point where you see oil and trace its path going up and forward, blowing baby powder from the palm of your hand will help in those difficult to see areas if there is too much oil present then buy a spray can of engine degreaser apply it to the affected area then rinse off with a pressure wand or garden hose, use compressed air to blow off excess water or just let it drip dry, take your bike for a 15 minute ride and check for the leak.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
How To Find An Oil Leak on Your Dirt Bike
kmx 125 oil leak trans or engine
Kawasaki 1988 KMX 125 Service Manual
OEM Parts for Kawasaki

Oct 08, 2017 | kawasaki KMX 125 Motorcycles

1 Answer

Do you have any ideas how to adjust supply of 2t oil that cause too much smoke and oil coming out from exhaust pipe?a newly overhaul kmx 125, 2002 model .

You adjust the oil via the oil pump. The throttle cable splits, one section goes to the carb and the other to the pump, you adjust the play/tension of the wire on the pump, while pulling back the throttle to see if it's aligning properly at full throttle and idle. Two strokes tend to be very smokey so unless the smokes an unusual colour it's usually not a problem. I have a Kmx 125 with a 200cc engine, I prefer running slighty rich on oil, better than running slightly lean! :)

Aug 12, 2011 | 2002 kawasaki KMX 125

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Maybe headgasket, butbbefore you disasemble the engine check the condition of he water pump,remove the cover and check the impellor has not parted from the shaft, if you can turn the impellor without the engine turning and the impellor doesnot turn when the engine is rotated this may be the fault, you could also check water circulation by starting the engine, may also be thermostat not opening, if you have already checked the above, it is a likely cause that pressure is leaking from the cylinder into the cooling system, ie head gasket, as previously stated only revert to this when all the other checks have been completed

Jul 26, 2011 | 2000 kawasaki KMX 125

1 Answer

Water is mixing in engine oil


Oct 29, 2010 | 2000 kawasaki KMX 125

2 Answers

94 Jetta w/2.0 engine overheats.I took it to a mechanic and he said my thermostat was fine.So what else could be causing it to overheat??And it does have a small oil leak too but I can't pin point it.

Overheating could be anything in the cooling system. Thermostat is out, could be radiator, water pump, broken belts which cause the water pump to not move, cylinder head warped, cracked, or the cylinder head gasket.

Aug 06, 2010 | Volkswagen Jetta Cars & Trucks

1 Answer

Leaky oil from small hole under the radiator pump.

The oil leak is probably a seal on the water pump shaft, There is one seal to keep the water in and another seal to keep the oil in, the small hole is a telltale hole between the two to let you know there is a problem. Dont remove the thermostat, any overheating problem could have something to do with the water pump seal

Apr 24, 2010 | 2001 kawasaki KMX 125

1 Answer

Engine overheats but is not leaking from radiator. After the SUV has run for 10-15 minutes at 1500rpms or less it overheats and begins to vent steam. When running at 2000rpms it only takes 2-3 minutes to...

check ur themostat take it out boil some water in a pot drop ur thermostat in the pot watch to see if it opens take it out watch it close if working properly,make sure ur pump is moving water take off ur radiator cap to insure water is moving,then check to insure ur cap is getting a good tight seal u only have ur cap,pump,hoses,radiator,thermostat,unless of course youve overheated recently???then u could have other issues

Oct 21, 2009 | 2000 Dodge Durango

1 Answer


Check to see if there is water in the oil...If there is water in the oil then it could have a head gasket problem..Did you ever replace the thermostat? If it is stuck then it would also cause overheating...Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.

Aug 06, 2008 | 1998 Plymouth Breeze

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