Hi Grumpy, have had a look at both gaskets and plastic insulator, they are all in good condition. Have some photos of them
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Have also stripped down and cleaned the carby again, not that it was needed, i blew it all out with air compressor and followed it with carby cleaner for a just incase. Photo of carby parts.
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Now all back together, will wait for a reply before i go any further incase i have missed something.