Hi. its me with the 21 that lay up for a while. I,ve cleaned the carbs out as best i can and though and set the air screws at one and a half turns out. set the float heights as best i could. it has helped it still runs really rough from about 5000 rpm. It will struggle on then run a bit better from about 8000rpm but then feels like its holding back. the end of the pipes are still wet as are the plugs when i take them out, any ideas before i leave it in somewhere to have it looked at.