try your battery cables if loose this may be your problemput some Sea Foam in the tank alsoall these additives in the gas sometimes cause problems if not being riden a lotlink on sea foamhttp://www.texasxriders.com/index.php?topic=3729.0
i'd say that you're not hurting the engine, just fouling plugs. just try and get to fixing the grounds as soon as possible. everything should be fine after that. good luck.