Re: My first build.
Welcome, the vibration may be because you've got your tensioner too tight. Make sure you have atleast a 1/2 inch of play(slack). If that doesn't help you may need to add more cushion between your front mount and frame. If that doesn't work it might just be your crank being unbalanced, I've had a couple motors that just shook the bike to death no matter what i changed! As far as a knock in idle, if its not an exhaust leak, your clutch might be barely grabbing, or you might have something worse on your hands. There's really no way to tell unless you take it to someone who knows and let them hear it in person! Hope that helps bro.