All that tells me is that the Aprillia doesn't have knock detection....
And more food for thought...Sounds like it's only mounting the Spyder on the dyno that's an issue....not the VSS....Hmmmm....
:banghead: Here's the whole thread then! He's talking about the Spyder. Please read post #6.
http://www.spydertalk.com/forums/index.php?showtopic=3122&hl=knock+detection