a lot of the stock cars i've worked on , we would use restricters instead of thermostats , once we got the wright size we were good to go , 2 years ago i sold my speed boat that i had for 14 years , yamaha pro-v 150 hp v-6 out board , i took out the thermostats & removed the centers & reinstalled them ! .. believe me , the last thing you want on a boat is to be out ripping were you cant see land & have a thermostat stick closed ! ... you better have a plastic jesus on hand ! "lol""lol"... so in my opinion ; remove just the center & reinstall it so it acts like a resticter so that the coolant doesn't go through the radiator to fast , before it gets cooled , and you will have to see for yourself how it is , engines need some heat to combust correctly ! ... so make sure you let it warm up before you pull away ! It will take a while to warm up with the coolant constantly flowing & then just keep looking at the gauge in different riding conditions , heavy traffic or ripping down the highway & let us know the out come ! The cooling fan is turned on by the cooling fan switch , when the engine starts getting hot , about the half way point on the gauge it will come on ! .. let us know how it works out !