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Honda Pantheon 125 Overheating


Guest megazone1
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Hello people Im new to this site and was wondering if any body can help me out with a problem with a Overheating 125 Motorbike

Story so far:

I purchased this bike Honda Pantheon 125cc 5 weeks ago and it is overheating and losing water. The previous owner has had problems before I think because the fan is wired to come on as soon as you turn the ignition switch on.

I have flushed the system and the level of water is full and can leave the bike on the stand for over a hour and the temp goes to about half way or just over and does no lose any water. When I get the bike on the road and pull away you can see water leaking from some where (line of water along the road) but can't find the place its coming from. I suspect it is coming from the radiator cap. Not the rubber cap that you fill the tank up from but the one up by the engine where the filler tank goes to a junction which goes it to the engine. Could this be a possibility as it only loses water under load.

Thanks for any help

John

Edited by Anonymous
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I have flushed the system and the level of water is full and can leave the bike on the stand for over a hour and the temp goes to about half way or just over and does no lose any water. When I get the bike on the road and pull away you can see water leaking from some where (line of water along the road) John

 

have you bled the system after filling it?

you could have an airlock,

try when stationery, increasing the revs and see if you can spot the leak, it could be fine on tickover, but when under load, as you suggest leak..

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Thanks WalneyFrankie for the reply:

No I have not bleed the system (didnt know you could) will look at doing this:

Also I have reved it when it is on stand and kept it at high rev's for quite a while but no leaks showed

only when it is riden does it leak

Thanks

John

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Thanks WalneyFrankie for the reply:

No I have not bleed the system (didnt know you could) will look at doing this:

Also I have reved it when it is on stand and kept it at high rev's for quite a while but no leaks showed

only when it is riden does it leak

Thanks

John

sort out the bleed, to get rid of any airlocks, this may fix your problem, and check the integrity of all pipes, etc.. squeeze them slightly with a dry hand, to see if they leak

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