Reply To: 1953 Big Twin Fires on Two but Runs on One Cylinder Only

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June 3, 2019 at 4:55 pm #176578
frankr
Participant

    By any chance, has it been converted to a fuel pump system? If so, how was it done?

    Back to basics, it needs fuel in the correct amount, spark at the right time, compression, and what many forget, crankcase compression. Your problem is in one of those areas. Sounds like you have covered most of them. Without any reason in particular, I am thinking crankcase compression. Checking the reeds was wise, but non-productive. Piston rings provide compression, but trashed piston skirts can affect crankcase compression. Has it ever been overheated?

    Thinking deeper,, is it getting water into that missing cylinder?