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Canadian Daves JustKDX
Hissing Sound?
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[QUOTE="Canadian Dave, post: 763831, member: 16102"] If you could see a white tube extending up from the bottom of your talk chances are good it acted like you were running out of gas because it was. The tube is the fuel inlet and if the pet c o c k was in the "on" position then likely you were sucking air. Turning it to “Reserve" should allow you to more fuel but again if you could see the tube you were very close to empty already. The hissing may be some air trapped in the cooling system. Have a look at the top of the cylinder and you'll see a casting with a 10mm bolt in the top of it. This is the air bleed bolt. It is hollow with a hole through its side about half way up. Loosen the screw until antifreeze begins to flow. This should allow all the air to escape the system. You may need to do it a couple times. Be sure to check the coolant level as well. Just remove the rad cap and you should see antifreeze. Do both with the engine cool or you run the risk of getting burnt. Other hissing noises could be the result of the engine overheating. Next time it is hissing have a look at the antifreeze overflow tank and see if coolant is being discharged into it, a sure sign of overheating. It could be that running with a low fuel level was depriving the carb of gas at times resulting in a temporary lean condition. Lean = high engine temps which could explain the possibility of over heating and the fact that it was happening at the end of the ride when the fuel level was at it lowest. David [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
Hissing Sound?
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