I'm getting some sort of vibration rattle at low rpm that appears to be coming from the flyscreen. Anyone else getting this? It is only at low throttle settings, and fairly annoying at a stop light, but goes away as the engine spools up. I've tried putting sections of foam weatherstipe tape between the flyscreen and upper cowling, but that hasn't really helped much. Thinking of trying a bead of clear silicon, but that seems like it might be a little too drastic.