Well tried a couple of things. First up could not get the engine to stall by blocking the throttles off as you suggested. In fact it made very little difference to the revs. Tried a few things to cut off air flow, including a rubber sheet a quarter inch thick. However was able to lower the idle by the adjusting screw right at the back of the mechanism that the cables attach to. Damned awkward, 8 mm nut on threaded rod with an allen key on the end to turn the screw. Managed to get it down to 900 to 1000rpm, but its still surging about 200 rpm. Its a lot better than it was but still has a vac leak by the sound of it. What do you reckon?? cheers Ern.
