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Discussion Starter · #1 ·
My cooling fan was running all the time so I deceided to change the thermostat switch and check water pump at the same time also changed thermostat while I was in there. This is on a 84 GL1200I by the way. All should have gone well and indeed maybe it has but I have some doubts about when my fan comes on now. It seems that the temp gauge has to reach the midway point before it comes on and it never used to get that high. I wonder if some other 1200I owner would phone in on where their's runs with outside temp in mid to upper 60's. Thanks for any comforting response.
 

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About 1/2 way or a little higher is normal.
 

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Junior Grue
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It seems that the temp gauge has to reach the midway point before it comes on and it never used to get that high. I wonder if some other 1200I owner would phone in on where their's runs with outside temp in mid to upper 60's. Thanks for any comforting response.
That sounds about right.
1/4 swing on the highway, 1/2 swing around town where upon the fan kicks in bringing it down.
 

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My cooling fan was running all the time so I deceided to change the thermostat switch and check water pump at the same time also changed thermostat while I was in there. This is on a 84 GL1200I by the way. All should have gone well and indeed maybe it has but I have some doubts about when my fan comes on now. It seems that the temp gauge has to reach the midway point before it comes on and it never used to get that high. I wonder if some other 1200I owner would phone in on where their's runs with outside temp in mid to upper 60's. Thanks for any comforting response.

This may give you an idea
 

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my 1200A bounces between 2nd and 3rd bar at outside temps 60-70. Fan kicks on at 3rd bar. In the height of summer, it hasn't gone above 4 bars. I've just changed out the anti freeze and it seems to run cooler.
 

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Discussion Starter · #8 ·
OOOh I likey the drawing, tells me alot. Fan coming on about two hundred, looks right. Thanks Tricky!
 

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its been 60-70 here and my bike runs at 4 bars most of the time. It did bounce to 5 bars after a fast run on the freeway while getting off the freeway, but only for a few minutes.
 

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you might consider flushing the radiator while your working on the cooling system. just a thought. regards walkabout
 

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I get 4-5 bars on my 84 wing going around town when it is in the high 80's so that is (5th bar is 185= acceptable) 6th bar = 203 degrees... a little warm, but water boils at 212 degrees, add some for each pound of the pressure cap and anti freeze/boil... I have seen the 7th LCD come on=220 degrees.. to me that is a little warmer than I would like it so I quit putting around town and GO FASTER or go somewhere and let her sit as by then the machine is too hot for me to ride her. by the time the 7th LCD indicator comes on the fan should be coming on. I imagine the previous owner used tap water in the radiator and that built up corrosion in the radiator(?) so it doesn't cool as well as it could. The odometer quit working at 54,xxx, doesn't smoke, runs well enough for me as my first "scooter" too bad previous owner left it outside with no cover and the clearcoat peeled off tank and tops of saddlebags. I will take my temp gun and check to see if the LCD indicator on the dash is reading right and fan coming on before I do anything rash... like work on it. IF IT WORKS... don't fix it!!!
 
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