Even at 10% Ethanol Gas, which can be up to 10%, that’s 3.06 teaspoons per gallon.
If he ran E-85 in the bike I could see it, but normal Gas that’s 10% or less, hard to see.
But you are correct, if he did run E-85 it would eat that metal up!
2018 KLR 650
Mods in Progress
Clovis NM (till the AF moves me again)
I think you have your teaspoons & tablespoons mixed up.
Isn't there 3 teaspoons per 1 tablespoon and 2 tablespoons per ounce?
But 12.8 ounces = 10% of one gallon.
I think that E-85 fuel would only be corrosive to carb parts and everything forward & internal of the engine. There should not be any reversion of fuel from back out of the carburetor to get E-85 onto that flame arrester screen.
The only thing that I can think of that might corrode the screen like that might be Sulfuric Acid fumes from an overcharging battery, with a miss routed battery vent hose (that would be really weird). That could potentially be a dealer preparation error. Someone should check the battery fluid level & vent hose routing.
And your 2 stroke dirt bikes doesn't use nor need an air filter flame arrester, the reed valves prevent any possible flash back.
I have a heat melted 2015 air box in my shop. I think I'll go rub some battery acid on its screen.