while confirming my 4 year YES plan with yamaha, i asked them a couple of question about electrical/ wiring things. i was told by them, that if any modifications to factory wiring harness,ie: tapping into,splicing etc...., gives them the right to refuse warranty work to any electrical issues that may arise while under original 12 month or YES. i was told that directives to dealerships, require hem to start looking at wiring mods initially when a bike comes in with any electrical problems. they said it can backfire on you if you end up with some actual mfg's defect. this would include all electrics, including fuel injection electrics. excluded are dealer installed genuine S/Y accessories , direct harness plug-ins and alarm connected directly to battery terminals. thought someone might be interested. this is odd, because nothing is voided for exhaust changes. some of the rules are more scrutized when you get the YES.