I know I have mentioned oil before; but bare with me for a bit.
My Voyager is not going into the red...yet! I got it at the end of summer here.
But, I noticed (like you) that the first time the temp gauge gets warm; the fan is capable of cooling the anti-freeze back down.
Then the second or third time; the coolant stays hot.
My thoughts are:
*The coolant is designed to get hot fast and dissipate the heat fast.
*The oil takes longer to heat up and retains that heat longer.
*Only the top end of the jugs are liquid cooled. (the oil has very little opportunity to dissipate heat)
Finding a way to decrease the oil temperature should also reduce coolant temperature.
I don't know what you have in your bike. But the Puralator filters are a bit longer than OEM.
That equates to more oil; more surface area; more heat dissipation.
Synthetic oil is also supposed to run cooler.
When I changed to a Puralator filter and synthetic oil; I noticed a drop in the coolant temps by more than a quarter of a tic mark.
If next summer I am still not happy with the temp; I will look into one of those sleeves that fit on an oil filter that have cooling fins.
2012 Voyager 1700
Pearl Alpine White/Pearl Luster Beige
2011 Rocket III Touring
There can be no happiness if the things we believe in are different from the things we do