I need help!! I have a 2000 ZX-12R with a faulty spedo needle. ALL other needles/gauges work....daily, after a short ride, bike turned off, the spedo needle does NOT return to 0mph, but around 80mph. Then, a few hours later when started, it normally goes back to 0. Any ideas?? I was quoted over $500 to repair with a spedo sensor unit??? Please ideas...thx!!!!