That's a lot of math in this thread... Anyone think of the obvious, which is that the speedo runs off of the countershaft sprocket and the bike probably has lower gearing than stock? :) ~Patrick -- 2003 Triumph Sprint ST 2004 (race) / 2001 (street) Suzuki SV650 2000 Yamaha WR-400 1975 Harley FXE1200