In my constant attempt to propell STN to the top of the heap for google searches, this is what you do when your Aprilia Mille/Tuono requires a cam sensor. Who do you know your bike needs a cam senso? Easy. The entire dash will become a giant warning message advising there is a problem.
Go into ECM diagnostics on the left handlebar switch and your code will read "0344 cam sensor".
As an Altima owner, I didn't fuck around with this because a cam sensor failure can leave you stranded.
A call to AF1 and a hundred bucks later (Including 10% off coupon) I received this thing:
Left side of bike, just behind frame rail is where you need to look.
Lift tank for better access. You can lift it easily by removing two bolts near steering stem. Be sure to scratch your fucking plastic tank as you lift like I did! Not much clearance. Push back on tank a bit while lifting.
Piece of 2x4 worked well to hold tank in place.