theres a real stupid and problematic idle circuit in hobbits, look up hobbit idle isues and "tip-in"
The shock from the handlebars is 100% a grounding issue. because the engine and the frame are connected only by the rubber grommets in the swigarm pivot and the rubber gromets on the shocks theyre electrically isolated. Run a simple ground strap or just a wire from a point on the engine or swingarm up to a bolt on the frame and that problem's fixed