The Busa does have a magnetic pick-up on the drive sprocket after some searching.
It seems that there acuracy is bad, up to 20%.
They sell speedo correction do-dads to correct this problem.
"Speed-o-Healer" and "Yellow Box" are 2 i found
You can change the corection factor any amount you want.
50 can equal 200 if ya want.
case closed?
Last edited by burtard; 12/31/2009 2:02 PM.