Join Date: Dec 2010
Location: Kingston, ON, Canada
...expanding on harper's notes; You need the seat completely removed, once the under seat storage compartment, electronics module and it's plastic housing are removed, the battery needs to stand on it's end to come out vertically between the upper frame tubes.
For about half the cost of an OEM battery, a higher amperage lawn tractor battery can suffice as a replacement. You just need to deal with the terminals being located on the wrong sides, the battery hold down screws being more difficult to align and set it up on top of a 1/4" thick piece of rubber pad.
Almost any servicing requires the lower fairing bits removed +++ and best to check the air filter once you are in that far.
If the bikes performance ever takes a serious dive, suspect the fuel filter , I'll be on my 3rd. fuel filter soon.