upgrading gas lines

Sorta true. Any modern "rubber" fuel line you buy from an auto parts store will be a synthetic rubber, like vinyl, neoprene, butylene, etc. as I stated above. Natural rubber hasn't been used for, or legally sold as, fuel line in years. Rubber, natural rubber from latex, deteriorates in contact with alcohol.
 
They must have pure gas in China then? Then again, it's probably more likely that the stock fuel line is just plain sheety.
 
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