by JimDirt » Wed Jun 25, 2014 1:23 pm
To set you at ease , my 450X engine itself is stock with exception of HotCams Stage 1 , and Stainless intakes , my 450R engine is stock with the exception of Stainless Intakes , i run 1 gallon of 130 Octane Leaded Av Gas from the local airport , to 5 Gallons of Premium 91 Octane 10% Ethanol Unleaded
My bikes run fine , actually cooler temps , and performance wise run better , so no worries , i have actually run pure Av Gas with no issues , and i find that it has way less carbon buildup on the piston and valves because of running it either pure or mixed ,and if the bike sits for a time it will still fire up with no carb crud buildup like usually happens with Ethanol crap gas
2020 CRF450R
2006 CRF450X

Weiser , Idaho