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Motor just bought a new bike and the engine was full of water and the radiator was empty. Any sugestions?

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The evidence presented indicates that the head gasket probably was blown or head/cylinder interface was not flat enough to hold compression and a gasket failure caused the cooling system to drain down into the crankcase.

Posted on Nov 10, 2008

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the evidence presented indicates that the head gasket probably was blown or head/cylinder interface was not flat enough to hold compression and a gasket failure caused the cooling system to drain down into the crankcase.

Posted on Nov 10, 2008

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I have a dt125r i have a problem with the engine gets very not and the temp goes into the red i pull over stop the engine look in the back bottle it full then when cold it goes back to the radiator co

Take radiator cap of start bike fill with water and coolent when bubbles stop eg when thermostat opens put cap back on done done start bike then take cap of any u no that like every 1 does hope it helps

Jul 08, 2012 | 2002 Yamaha DT 125 R

1 Answer

Is there supposed to have alot of heat off the engine even if temp. gauge shows good temp.

Sportsbike engines do run a bit hot at times, depending on how you use them. What exactly are you talking about when you say "a lot of heat off the engine" are you talking about feeling it on your legs when you are riding the bike? Is this a new problem for the bike or has it always been like that?

If the engine really IS hotter than the gauge is showing then there might possibly be a problem with the temperature sensor. Usually this will be screwed into the radiator somewhere with a single wire connected to the plug. If the threads of this plug are dirty or corroded it might give a false reading as the plug needs a good earth for the signal to be correct. Also, if the engine has been run on water only rather than coolant the actual sensor that sits inside the radiator in contact with the water may have some corrosion on it and require cleaning.

Another possibility is that the thermostat is not working and blocking the flow of water/coolant in the system. This might cause hot water to become trapped in the engine and the cool water in the radiator is not able to circulate into the engine.

Finally, one other thing that is a common cause of bike engines running hot is a lean condition where they are not getting enough fuel for the air being taken into the engine. This is a very common thing to happen when the exhaust is replaced with a much more open pipe without doing any rejetting. However in a normal situation you would expect to see the temp gauge running slightly higher if this was the problem.

If it's any comfort I've seen stunt guys try and blow up a ZX9 deliberately and they couldn't do it. Jammed the throttle full open for about 15 minutes, smashed the radiator and let all the water out, then finally kicked it over and smashed the engine cases and half the oil ran out. Still wouldn't stop running. They made those things pretty tough.

Feb 22, 2011 | 1997 kawasaki ZX-9R Ninja

1 Answer

Motor would not shut off and radiator fluid shooting out.

cable pulled out of carb top and pulled throttle open. on top of this water pump stuck open and thermasat did not open. Unless water jacket is cracked. Motor went into deseiling and thats why it would not shut down with kill switch

Mar 05, 2010 | 2002 Honda CR 250 R

1 Answer

Helo i have a bike and cant get it started even though..

the starter clutch sleping and not turne the engine ,trying to push the baic for start

Aug 26, 2009 | 2005 Honda VTX 1300 R

1 Answer

Does the 1989 Honda GL 1500 Goldwing have a water pump.

Well, this is a water cooled bike. Few things can cause this:
1.) Low water in radiator.
2.)Dirty blocked clogged radiator fin openings, or clogged inner radiator with rust and sludge.
3.) Electric coolong fan not working- could be temp sensor, fan relay or fan motor itself.
4.) Worn radiator pressure cap.

May 27, 2009 | 1989 Honda GL 1500 Gold Wing

1 Answer

Over heating triumph sprite motor cycle 955cc

Sounds like an airlock. When it fell over an air bubble would've gone to the highest point of the cooling system, & when you picked it back up the air gets trapped, if it gets trapped near the thermostat it will send the computer a false reading & fans wont turn on causing an overheat. Give the cooling system a flush. Remove lowest cooling system hose you can find I think its the water pump hose, & remove the radiator cap all the coolant will drain. Put your garden hose in the radiator turn it on & start your bike, run the hose through it for about ten minutes or untill the water coming out of the hose you removed runs clear then shut the bike off. Put the water pump hose back on, clamp it up, & fill the radiator 50/50 water/glycol. Leave the radiator cap off start the bike & get it to normal operating temperature, as it warms up air will rise to the radiator cap & the coolant level will drop just top it up accordingly. Once the bikes warmed up & bubbles stop rising,  put the cap back on & take it for a ride. Hope this helps! 

May 23, 2009 | 2000 Triumph Sprint ST

1 Answer

How to test the engine coolant is curculating correctly ? as this is my first water cool bike.... cheers Phil...

you can start the bike up and leave it idling with the radiator cap off until the thermostat opens and see the water circulate thru the radiator once it is full and you see it circulating you can put the cap back on
do not open the radiator cap while the bike it hot

Apr 27, 2009 | 2004 kawasaki KLX 300 R

2 Answers

The tempreture in my cbr 400rr get high every time i start ride my bike it come over the meddel i ride my bike in a small city it start come high after 5 minutes i start riding bike i put in the redeter...

Is your fan kicking on when your bike starts to get hot?

On my cbr the fan would kick on at 215 degrees. Even sitting in traffic on a 90 degree day my bike would only get up to 220 at most.

If your fan is kicking on when its suppose to and you have your radiator filled up full then I would check your thermostat.

The thermostat is an object that opens up when your engine reaches a temperature of around 180 degrees and lets antifreeze run through your engine to keep it cool. If the thermostat isn't opening up then the antifreeze isn't circulating through your engine, its just sitting inside your radiator. And that's not what you want.

You can remove the thermostat from your bike and put it in a pan of water and heat the water up with a candy thermometer in the water and you should see your thermostat open up at around 180 degree's. Just do this on the stove. The water won't be boiling so you will be able to see it open up.

Hopefully its just your thermostat because they are very cheap(around 10 bucks).

If your thermostat is good and your fans kick on when they are suppose to then I would say its a water temp sensor or a sensor period.

I'll bet though that if you take your bike for a ride and when it gets around 215 degrees that your fan isn't kicking on to help the motor cool back down.

Hopefully this is the case and if it is you can just run the fan wires to your battery and hook up a toggle switch to turn your fans on whenever you please. This is just a bandaid fix and not fixing the real problem but it will get you by until you can fix it the right way.

Well I hope I may have been of some assistance and good luck,
Remember to check your fluid while the bike is running and warmed up completely, because if you just fill your radiator with the bike turned off it will only fill your radiator with fluid and not your motor as well(because the thermostat will be closed) which is what you want. Also after you fill your radiator when the bike is running and you can fill it any more let the bike run for a little while with the cap off to let any air in the cooling system purge out of the open radiator. You should see some air bubbles coming out of the radiator cap hole. If you have air in the system that will cause your bike to overheat as well. Had this happen on a Honda Car.


If you feel I did a good job answering your question please give me a fixya rating and THANKS!

Apr 05, 2009 | 1998 Honda CBR 400 RR

1 Answer


the evidence presented indicates that the head gasket probably was blown or head/cylinder interface was not flat enough to hold compression and a gasket failure caused the cooling system to drain down into the crankcase.

Nov 10, 2008 | 2007 HM CR 125R

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