Rubber items will eventually degrade and split with UV exposure and general wear and tear.
Anti vibration parts like this perform a vital function in protecting against damaging vibration - renewing these items will be less expensive than replacing the vibration damaged fuel
Tank!
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17611045020
If the fuel Tank is to be removed and replaced then renewing these would be a sensible move. Make sure you order all the parts required at the same time and save money by avoiding multiple shipping costs.