Join Date: Jun 2008
Location: New York, NY, USA
I had same issue. I chose to just what you said, ran charger plug wires direct to battery and it works great with the latest BMW Battery Charger, which was a PITA to use.
2008 K1200GT, Custom Paint, Vivid Black, Aeroflow WS & Aeroguards, Givi E52 Maxia Topcase w/AdMore Lighting, Zumo 660, Suburban Footpeg Lowering, Sargent Seat
2009 R1200GS Adventure, Magnesium Grey/Black, Adventure Cases, Zumo 660, Touratech Unobtanium Accessories
1974 Norton Commando 850 Soon to be a restoration project