Quote:
Originally Posted by Seeker
Ethanol is not directly related to octane/or knocking. The problem with ethanol is twofold:
1) It attacks rubber and plastic parts causing them to disintegrate which plugs jets and causes leaks.
2) It's hydrophylic - it likes water and will absorb it from the atmosphere. The water/ethanol mixture then separates from the petrol and causes rust or even worse a gel-like gunk that plugs up everything.
Keeping your tank full helps but the problem usually manifests itself in the carb float chambers.
Modern vehicles have synthetic rubber and plastics designed to tolerate ethanol which 40 year old bikes do not.
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Best thing to do if it's not being used regularly is to drain the cars etc. I have a feeling that mine will only be out a couple of times a year, after that it'll be in my living room as an expensive ornament
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