Did anyone do any carb work on their bike yet? Mine´s an ´82 cm250 with fairly low miles (9000), and the only problem I seem to be having is that it idles a bit rough and lurches a lot for the first 20 minutes of riding. I have the maintenance history of the bike and I don´t think the carb has ever been cleaned. Plugs are fairly new, and it´s summertime. Does anyone have any suggestions for working on the cm250 carburetor?