E85 is a lot less efficient at burning than 89 octane so I'm guessing you'd need much larger jets to use it in our bikes.
Air/Fuel Ratios
- - - -Ideal - Rich Limit - Lean Limit
Gasoline 14.7:1 - 12.5:1 - 13.2:1
Methanol 6.4:1 - 5.4:1 - 5.7:1
Ethanol 9.0:1 - 6.4:1 - 7.8:1
E85 - - - 9.8:1 - 7.0:1 - 8.5:1
