leaks?
Have you checked the carbs seat properly into the rubber stubs?
(I have rebuilt my carbs, new Diaphragm, needle valve, cleaned jets and airways, new gaskets, set up correctly as per the book.)
another thing to check is, daft as it may seem, is the Spark Plug NEW and correctly gapped, as well as that check the HT lead and the Plug Cap.
Martyn
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