My bike has a sluggish idle for a week now. I go along and cruise at a speed and its starts to dip, being sluggish. The effect is like it was raining and getting that sluggishness and then turning the twist and it responding faster. I cleaned the plugs sprayed a carburetor cleaner directly into the port. No change. Only briefly did I have it run good for one day. Then the next (today) back to sluggish. I also upped the gaS TO UNLEADED PLUS. Any suggestions?