go to scootertherapy.com and check out their pic of cdi derestriction, you are going for a wire that is basically covered in epoxy to protect the circuit, it is actually a greean wire and is right next to back edge about 1/4 inch in, you may not see the wire, but I went 1 swipe at a time with the hacksaw and actually saw the wire and the green plastic around the wire, be sure to have good light while you are doing this!! Be sure to check out scooter therapy.com for cdi derestriction, very good site. Let us know how it goes!!