misfire only running on centre pot

[threepot]

Reading your posts again,you've had carbs off,diaphragm stuck!silicone!! you've got a spark with each plug,valve clearances good? Plugs seem dry after running on 1 cylinder? Think your problem is the carbs??

[beefos]

That's why I stripped the carbs but they all looked good.

The one with the diaphragm that had some silicon sealing it down was the good cylinder - number 2.
I removed the silicon and that pot is still good.

[Sin_Tiger]

Then you have problems with the other two carbs.