The thermostat should be full open at 85°. When it's been hot outside my bike runs around 85° to 90°. I have my fans set to come on at 95° and turn off at 90°. This has helped keep the bike a little cooler while in traffic and holds the temp around 100°. Mind you, my bike is a daily driver and not a track bike. On the track you can expect higher temps since you're running the engine at higher RPMs for longer periods of time. To fight this, race bikes use huge radiators like CSF and H2O Performance make as well as removing the thermostat. A less expensive alternative is to buy an expansion radiator setup, however being stopped in traffic with little to no airflow is still going to heat the bike up fast regardless of how big the radiator is.