There is no need to run anything other than regular gas in the bike, the extra octane only makes the VMax engines run hotter. I would start by adding about a half a can of Sea Foam to about a half tank of gas. Run it at idle until the new mixture is in the carbs 7 or 8 minutes ought to do it. Leave the bike sit overnight, then top off the gas tank and take the bike for a hard ride, ride it like you stole it, this should clear your problem. CV carbs also need to be synced once in awhile and should have been done if you rejetted.