That bike of yours is a gen one (2003 or so?) yes? Gen 1 requires 87. Gen 2 requires 91.
I trust you guys but here abject fear takes over. Idling around stoplight to stoplight next year in 90 degree weather I will worry to death.
I decided to start with the easiest route. After work I took probably my last ride and coldest ride ever at 47°F and it was surprisingly refreshing. Work has been real high pressure so I could have ridden to the Arctic and thoght, "This is better than work!" I rode to the station to fill the tank. I added some ethanol-free 89. Holy cows, $6/gallon. I cannot get myself to fill it with 89. So I filled the rest with the next up which happens to be 93. At least I gleefully lowered the volume of ethanol.
I will attempt to keep the tank propped for this project but if clearance becomes an issue then I will siphon, remove, and refill it.
I used this and Seafoam for a long time. Then I saw testing where this stuff all caused corrosion. Last season I put nothing in the Hayabusa. It started right up. With little air in the tank, the gas just is not going to oxidize much especially during the cold when chemical processes slow to a crawl.
My VFR requires Seafoam on periodic intervals. The starting and idling becomes noticeably different. I requested that the mechanic who has it now go through that fuel system and replace filter/screen as I am guessing that has not been touched.
Overall with my vehicles & equipment I now do everything possible to reduce or eliminate the use of cleaner/preservative.
It’s an 06. Gas around me is in the high $4-$5 range but I live near Yosemite NP so I always pay tourist prices unless I’m on tour. I had six bikes once and used StaBil on occasion and I still use SeaFoam on occasion with just two bikes even though I always use top tier fuel. The key I think, to using SeaFoam is to use it sparingly. 2-4 ounces in a full tank and head out. Amd then 9-10 tanks later, repeat. I think it helps to keep things clean. I have no need for a fuel stabilizer anymore. There’s only one gas station around here with ethanol, a Gulf station. I don’t go there. I’ve ridden in all temps from desert to over 10,000’ and in traffic. Single fan and never overheated. 81,000+ miles so far with never an issue so I think it’s broken in.