Sudden misfire and its not due to rain

[richfzs]

Yes I think so - unless it's already got back pressure from the carbs, so that it thinks the float bowls are full (in the way that it doesn't click away when you turn the ignition straight back on after switching off).

But having just read your post again properly  :rolleyes :rolleyes :rolleyes :rolleyes :rolleyes I see you've taken pipes of both sides - so yes, I would have thought it should be clicking like a clicky thing.

There's a 2nd hand pump on fleabay for 40 notes, which seems like a lot, but they're asking 80 for new ones  :eek :eek :eek