2002 Honda Shadow

MY 2002 HONDA SABRE MOTORCYCLE CAME WITH A SEEDOMETER THAT READS APPROXIMATELY 10% HIGHER VELOCITY THAT ACTUAL VELOCITY. I HAVE CHECKED THIS BY TIMING AGAINST MILE MARKERS WHILE TRAVELING AT A SET SPEED (60 MPH) ON THE SPEEDOMETER, AND I HAVE ALSO CHECKED IT AGAINST SEVERAL OTHER CARS AND MOTORCYCLES. ALL TESTS TO DATE CONFIRM THE 10 % HIGH READING. I HAVE ALSO RESEARCHED OTHER HONDA SABRE OWNERS ON INTERNET AND ALMOST ALL OF THEM COMPLAIN OF THE SAME PROBLEM. HONDA'S RESPONSE TO DATE HAS BEEN TO CLAIM THAT IT IS LEAGAL TO BE OFF 10 %. I THINK THIS IS A SAFTEY HAZARD IN AT LEAST TWO WAYS. SINCE I AM ACTUALLY TRAVELING SLOWER THAN THE SPEEDOMETER SAYS THAT I AM, AT NIGHT TRAVELING HIGHWAYS, CARS CAN APPROACH ME FROM THE REAR VERY QUICKLY AND POSSIBLY OVER-RUN ME. THE OTHER PROBLEM CAUSED BY THIS IS THAT I NOW KNOW THAT IT IS READING TO FAST SO I NOW END UP HAVING TO GUESS/CALCULATE WHILE DRIVING IN ORDER TO MAINTAIN LEAGAL SPEEDS AND NOT IMPEDE THE SAFE FLOW OF TRAFFIC.*AK