Octane= the speed and ability in which a fuel burns. IE 85pump gas will burn faster and more complete than sunoco 100 octane fuel.
a high comp motor will squeeze 85 pump gas until it detonates from the heat/pressure it generates, Detonation.
a stock comp motor will try to burn a high octane fuel but wont burn all of it. End result- a LOSS in power and a shit tone of Hydrocarbons(unburnt fuel)
unless you have some motorwork done to your bike, you are better off buying 85 pump gas, you will make more power on pump. same with the fuel at vickery, its 110 octane doesnt do shiet if you dont have compression to burn that slow of a burning fuel.
http://www.vpracingfuels.com/page469685.html
Mr12=87 octane, the best fuel to burn in a motor without high comp. it just costs a arm and a leg.