goofy cooling issue

millj

Registered
i have a 99 busa, just had the tranny rebuilt, and re-ringed the pistons.
when it was first fired up the temp gauge did not work the shop put it on their diagnostic and they said it was the fan control switch. replaced that no change, i got code C15 off of the bike myself replaced the ECT no change.
now what? new thermostat? new gauge? The bike starts hard when it is cold, but after it runs for a few minutes it will start up no problem and runs good
any new thoughts would be greatly appreciated.
 
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