Changed my front sprocket yesterday to a 17 on genII. Everything went fine, rode last night with no issues. Started the bike this morning and I have no Tach or MPH everything else works fine. Checked all fuses and rechecked the speed sensor connection... evrything is fine. Checked the speed sensor with a Ohm meter and two of the prongs have resistance (3 wires). I unplugged the sensor and started the bike and nothing extra changed. Tried unhooking battery and still the same. Has anyone unplugged the sensor and started the bike? Wondering if they will get the same "no tach and Mph". Thanks, Dozer.