16-10-19, 11:27 PM
It’s quite easy to get a misleading compression test result, particularly on cylinder 3 since that plug well tends to suffer more from corrosion… if the tester doesn’t seat quite as fully the extra space will result in a lower reading. That said, have the valve clearances been checked?
The carb slides are teflon coated and stay dry in normal operation. After a high mileage (80k+) the coating can wear and they don’t move so freely. That’s not likely to cause flooding though.
The float valves and the rubber o-ring round the brass body of the float valves can leak, quite common now these bikes are getting on a bit. Checking the fuel levels in the float bowls is slightly fiddly, but can be done with the carbs in-situ.