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Hi !

Now Im third hour in page Gas-Gas, and I think I will here some hour more, because here I found a lot of answers on my questuions... I have one problem with my GAs-Gas 321 - 96. Last season I had problem with cooling, specialy with tubes. I brake gasket in my head of cylinder several times, and several times I change broken rubber tubes. I solve it (I had sharp edge in pump connection, and in this place I still brake tube...), and now I had problem cooler. I need after each riding check level of water, and still is missing about 1 dcl... ..exactly I dont know right volume of water, which I need to have in cooler, and I give there water still to have full cooler, because I have fear from next changing gasket under head of valve. Could You help me?



Your English is excellent, you speak my language MUCH better than I speak
yours! I have the same type of bike as yours, the 96' JTR 370, and I've never had any cooling problems so I think you may possibly have a warped head or cylinder sealing surface, which would allow hot exhaust gas to enter the cooling system. This sometimes happens when an engine is overheated. You may also have a problem with the cooling fan not working or a leak in the cooling system, either one could cause the problem you describe. Another rare possibility could be a problem with the pump impeller or pump gear but this is unusual as the Gas-Gas water pumps are very reliable. The coolant level should be just below the neck of the tube where the radiator cap goes on. If you have a Gas-Gas dealer nearby I'd have him check it out. If not, you or a good motorcycle mechanic might want to look at these areas of the bike.

Good luck Martin.


Professional tuner and 'Trials Competition' writer Jon Stoodley has very kindly stepped up to the plate to answer your questions. If you're having problems, or need some advice just send an email to Jon. If it's something that could be useful to others, we'll post it on the site.
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