Thanks, will look at the carb when the rain stops. It ticks over quite well in idle but every now and again the drops a big chunk of revs, then picks back up, but doesn't seem to have the same sound as usual, bit more spluttery. when I rev its not really getting the power, then sputters a bit more and loses it all together. want to use the word 'misfiring' but I know thats a technical term, but thats how it feels, like its misfiring. Cleaned and checked the carb a few weeks ago and its been super fine since then.