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I once used 87 oct. bike should have 89 oct. now I use 92 oct. just to even things up.
You're probably unaware that adding ethanol to your fuel is changing the A/F since alcohol has a much lower stoichiometric ratio...somewhere in the range of 9:1 where full on gas is 14:1. So, it's like you're adding non burning solids to your tank; upping the octane level to slow the burning is adding more non burnable solids into the equation. May not be the wisest choice when you think about it when it comes to plugs and carbon build up around the valves.
A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)
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