On my SP1 I only used the OEM Hinda coolant, kept the bike fine here in NC during the summer...never got above 220.
On my SP2 I currently have Engine Ice (from PO...never got above 215-220), but shortly I will be switching to just distilled/deionized water with water wetter for the upcoming track season. I will go back to Honda coolant for the winter storage.
There are a few TX members here that I'm sure will chime in soon.
2001 SP1 (sold)
2004 SP2 (properly stored)
2012 Ruckus (stolen)
2015 Grom (under construction)
Weyrauch pronounced (Y Rock)...Rock for short.