The stock Honda Thermo-Switch is set for 110’C, way too hot.
The carbs start cooking and the Engine sputters.
Takes a while for Temps to come down from way up there.
The Fans come ON when the needle is about 3/4 way up the Gauge.
So I found and ordered a 95’C Thermo-Switch;
Fans now come ON when the Gauge is 1/2 way up.
Cooling happens faster too.
I would like the fans to come ON even sooner (90’C?).
Somewhere I saw the Switch Temp is set for 95’C but ±5’C.
I think the Thermostat is set at 88’C?, so a 90’C Switch would work, but might come ON a lot.
This is still much better than Stock.
These were the last 2 shown in stock (Rockauto.com)
Don’t know if they will restock, but equivalents should be around.
I’ll install Switch #2 on Bike #2 and see if the gauge action matches.
I’ll have the one bike in the Eastern Oregon desert in about a month, will see how it works.
That bike also has a Manual Fan Switch (with Indicator Light, or else I forget) as backup.
Also rember to have a new O-Ring handy (13.5 x 1.4)