Choice trip!
Is it your first "big one"?
If so, don't over think it. Keep it simple.
Standard bikes, serviced and in tip top shape, is the way to go IMHO. Say no to the big bore kits, performance exhausts, carb mods, intercoms, temp gauges, GPS etc. to stare at, distract you, and / or worry about.
I replace the consumables / wear (worn) items BEFORE departure as part of the service (e.g. cables, brakes, rings/piston, clutch etc). Using proper (matched set) tyres (e.g. Pirelli) and factory shocks I'd recommend too. Take wet weather kit, that you have tested, solid waterproof riding boots and 2 pairs of gloves.
Are you camping?
I'm no expert , but I have done multiple long trips, over the years, and have a few packing tips to offer, that may be helpful, once we know your specifics.
Replacement tyres as previously said, is the way. I have them already mounted on rims, and use new nuts and spring washers each time. Same with extra 2 stroke oil. In New Zealand we use sheepskin seat covers for extra comfort. Just tie it on with a bit of string under the seat. The one I have was my mates cousins nephews ex-wife.
EDIT: I forgot to say that I find a windscreen (decent size - not too big but not a token one) to be helpful. Makes for less tiredness as reduces wind buffering (less unconscious micro-muscle adjustment).
EDIT 2: I found a pic from a weekend trip from winter last year.
Big waterproof tube bag on the floorboards. Big is good. Its out of the wind and fills a void. Tent, sleeping bag, clothes etc. cram in here. Secured with ratchet strap and can be pushed to the side to allow easy access glove box. Give it a kick, at the bottom, and you can make room for your foot for the rear brake. It doesn't much get in the way of the handle bars. Put some hooks on floorboards using the stand bolts holes to secure it.
Top box for feedie and other kack (keep it light as possible). Make sure the carrier is a strong quality one and use big bolts through the number plate holes. Tools and spares in glove box helps distribute weight forward and low (heavy stuff). Heaviest stuff goes on non-engine side of glove box. Chuck in a packet of big fat strong cable ties.
I don't put anything much on the front rack (any weight / bulk here makes the bike shitty to ride and lift off the centre stand - just don't)- this is good, however, for quickly ridding yourself of wet weather gear if it gets hot, or for buying supplies (e.g. beer) when you are nearly there for the day.
Using a side stand is ideal for short stops. Don't fill up autolube or petrol using this. Can't leave bike idling on side stand either (spits oil out clutch breather) I don't park it up overnight on it either. Keep centre stand too.
The yellow stripes on the side is reflective tape stuff for extra safety / visibility. There are red ones on the back of the top box and and a small white one on the front mudguard trim thing.
The covers on the indicators just might save them if you have a spill so you can carry on safely. Torch and tape in glove box for emergency headlight. This bike also has heated handle grips.
If you put crash bars on the pods (removed here) you can bungy your tent to one side on top of the pod and a fold out camp chair on the other side. You can also tuck in a pair of converse sneakers. Bungies go under the seat so you can still gas up. You don't want anything on the seat you have to take off each time you get gas. It gets annoying very early on.
That's Karen on the seat.
Unforeseen things?: New Schwalbe (
WeatherDeathMan) rear tyre delaminating after a few days (never ever ever buying anything from them again). Heidenau, supposedly, winter tyres were awful too (unpredictable grip on wet roads). Brand new front shock leaking oil (Escorts). Sandflies. Fallen trees, slips, gravel, etc. on the road around blind corners.
Chur, hope this helps.
PC