I'm fan of Paul's incremental process. That said, some things are universal, others a matter of taste or preference.
FZ1 mirrors have been mentioned. I was somewhat blase' about these and didn't bother until I crashed and
had to replace the mirrors. Worth it. totally.
Handguards - Either the Gen I Suzuki if you use the bar end throttle lock or Gen II if you use a VistaCruise/NEP or full CC unit. Keeps your hands drier in rain and you can use lighter gloves and still stay warm/dry. Especially in conjunction with heated grips. Consider a
Heat-Troller with the grips and it's mandatory with the heated gear, regardless of what brand you buy, use an original
Heat-Troller.
MUCH better quality and control.
Cramp Buster or similar device.
Sliders!!!
Fender Extender - the
cheapie or the
Carbon Fiber one.
A metal radiator guard. Make your own or beef up the oem one with some hardware store screen, but do something to avoid rock damage.
HID lighting - Decide on what you want and believe you will use. I went with just headlight upgrades because I so seldom get to use aux lights or high beams. That said, I'm adding a dedicated low beam HID aux light this winter.
Replacing those PHids? Gen4, Micro DE, China knock offs of the Solteks, Solteks, dualing HID/Halogen? Lots of options. Remember that HIDs don't re-light instantly, so depending on what you do with the headlights, you may need to convert to an always on low beam or one high, one low set up.
Heated gear/grips. Rallies take you to all kinds of places. High altitudes get cold at night, even in the summer.
Dash shelf? Depends on how much stuff ya got to mount. GPS? Radar Det.? Sat radio ant? Other crap? I mounted the EZ Pass to the wind screen, but some do it to the shelf.
Fuel/Water - fuel cell is highly optional, but water is not. You must hydrate on the bike if you are going to be affective. For some this is as simple as a couple of water bottles w/in reach. For many it's a 1/2 gal or 1 gal jug with a hydration tube and bite valve. Easy to roll your own, just have to find a spot to mount it. Put thought into where it goes, how easy it will be to fill it with ice and water, and where you are going to route the drinking tube and retain it. Consider something like
this. (note the length) or find a key chain retractor that's at least 36".
Then it gets expensive....
Linda T.
She makes rockin' fuel cell covers too.
Pin-Lock visor for those rain rides. Works fantastically well. They sell one for the Multi-tech.
Got flashlights? Three of them? A small one to clip to something you need to light up at night? A big one to flood with? A back up?
How are you going to secure the rally flag to the bike for pictures? Figuring that out now saves a bunch of time later.