Question about 2005 Yamaha FJR 1300

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Engine temp guage runs half way while riding

I have had the sender unit changed twice and the guage still runs at half way while riding, im told this is ok, but sometimes it runs on 4 bars just over 1/4 hot, is something wrong or is it ok. The engine doesnt feel hot while im riding

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  • Yamaha Master
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That sounds ok, it would be more of a problem if it went over half sometimes. The only other things that may make it flucuate could be a sticky thermostat or an air lock somewhere in the hoses, but these generally cause overheating. At half way it is not overheating.

Posted on May 02, 2010

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the dash guage is but a toy and not and instrument.
if fact it has no numbers on it, no 180F. markes there....so....
the gauge is reading hot because the 1 pin 1 wire, sender wire
for the gauge is grounded out, remove this wire from sender
and the guage, must go to low.
btw here is the G16 being gauged, FULL HOT.
the gauge and sender tests are in the FSM. read that.
http://www.fixkick.com/sammi-stuff/index.html

here is the G16
the no num gauge.
http://www.fixkick.com/Cooling-engine/new195F-reading.jpg
here is the best way to measure engine heat.

http://www.fixkick.com/Cooling-engine/rad-top.jpg

see how well the RAD works, see this. big drop !
http://www.fixkick.com/Cooling-engine/rad-bottom-left.jpg

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yours is near identical.
http://www.fixkick.com/sensors/tests/Guage-coolant-test.html

on you car pull the sender lug. stuck H.
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My guage runs half way whike riding and climbs up to 3/4 some times is this usual the other day it went up to the light comming on.


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