I have had this type of hydraulic clutch actuation on my VTX1800 and now the Valk that is about 10 years now. I replaced the fluid on the VTX once with a vacuum pump from harbor freight. Worked great. The chatter and weak return I do not have and have never experienced. I remember after getting the Valk I heard a whine from the front and other folks didn’t. I went to Honda on a Saturday and a guy with an F6B was happy to run his bike for me. I heard it on his as well. Turned out it’s normal for the motor. Have someone confirm if it’s correct. You didn’t say what year it is. Is it still under warranty?