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I have looked at the impeller, and the blades look good and turn fine.. I removed the thermostat for better flow? and hooked up the fan so that it would run continuos...still within 15 min the gauge reads hot? I have disconnected the radiator from the bike and poured water though it with no restriction.. What am I missing?.please help.........
 

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Is it actually hot? It might be a bad guage or sender unit. It might also be a bad voltage regulator....the one for the guages that drops the voltage down to 7V.
 

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Im not sure if the gauge is accurate, but I could check it with a thermometer.... It will peg the meter with the rad cap on or off....
 

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Is the main radiator hosing getting really hard when the engine is heating up? If so, that's a sign of head gasket failing.
 

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The top hose...I dont know, I havnt checked it for that..
 

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i had almost the same problem with the gauge but mine was affecting the gas gauge as well as the temp gauge it was all to do with a bad 7 volt rescortiorsent a long time chasing it down the wost part is i dont think the is a way to test it
 

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First off you never want to run an engine without a thermostat. The thermostat forces the water to circulate throughout the system. Without it the water will not circulate through the block & it will overheat.

You don't give a lot of details but was the fan coming off & on properly. The fan should come on around the middle part of the temp gauage. Was the top rad hose getting hot to the touch? Is so thermostat was opening. Was the rad full of antifreeze & the overflow tank at the full mark when the bike was cold.

90 % of the time these bikes overheat because the fan doesn't come on like it should or doesn't come on period. You are going to have to back up & eliminate some things. Seeing as you have the thermostat out you can test it by heating up some water & making sure it opens. Put it back into bike if OK. Fill the rad with water/antifreeze until the level stays up near the top of the rad cap. Start the bike and keep adding mixture to the rad until the level stabilizes or starts coming up. Put the rad cap on and then fill the overflow tank to the full mark. Run the bike until the fan starts. If fan hasn't started by the time bike reaches the upper poriton of its operating range, shut the bike off. It is the thermo switch that is bad. Your fan obviously works when it is direct wired so that's not the problem.

If after replacing thermo switch & having proper amount of antifreeze, the bike still overheats then I would look at having the rad professionally cleaned.
 

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Do a leak down test on your cylinders or have someone do it for you

to determine if its a head gasket problem.

If not then start eliminating cooling system components one by one til you have

found the problem.

If your rad flows freeand you took the thermostat out and it still overheats

then by logic it leaves the water pump or head gaskets.

Did you drain the engine oil and look to see if it has coolant in it?

That can help you eliminate some things as well
 

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Thanks alot, for all the good advice!! I will try puting the themostat back in (it test good)and run it, keeping check on the top hose.. I didnt know about running it without one, so thanks.. and I do know the little hole faces 12 o'clock and burping... The fan sensor is not working, so for now I will wire up a toggle to turn it on at midway..The oil was changed recently and no signs of water content.. With all I have done to this wing, this problem has been on going since I bought it.. Figuering an over heat problem to be no big deal,,I made it the last worry....LOL It's kicking my a.. for now!
 

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One more thing to check.

Check that your ignition timing is correct.if it is out it can cause the bike to run hot



Good Luck,Ride Safe
 
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