Pure Gas Availability in Meade County, South Dakota:

Sturgis Area Non-Ethanol Petrol:
(courtesy of Pure-Gas.org)

Deadwood-
Packhorse Liquor, 95 Sherman Street, Amoco.
(unsure of octane rating)

Rapid City-
Big D, (1) 3010 West Main, (2) Campbell Street
Safeway Grocery Store, 730 Mountain View Road
(87, 98, 91 octane)

A couple of shot glasses full of octane booster such as the new Lucas product, or even an older competitor like "STP" will take care of any minor skips in performance with the lower octanes.  Add the booster just before you fill up, and never use it without mixing with gas.  At five to six thousand feet of elevation, most bikes will run fine on 91, and probably 89 non ethanol straight gas. Air cooled v-twins, with 10:1 or greater compression, especially the older, carb'ed scoots, run cooler, get far better mileage, and last longer when fed what the engines were made to fire on. Until manufacturers design motorcycles to run on ehtanol-blended petrol, it is what it is..

*Footnote:

There has traditionally has been a spot or two in Sturgis with available pure gas, one with 100 octane for sale.  Follow us.  We'll hunt 'em down soon as we get there.