For motorcycle camping in Europe I would suggest:
Dump either the tent or the hammock/tarp, don't take both, just take whichever one you prefer. My preference is to keep the tent.
True, makes more sense but is less comfy.
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You'll definitely need a ground pad of some sort to insulate yourself from the cold ground - it's the most important part of staying warm in my personal opinion. Take a a closed cell foam roll for ultra light,
This is what I have and would bring, even though I´d love to play with new kit.
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Cooking depends on what you want to do. Are you just boiling water, heating ready made nosebag or cooking proper food. If you just boiling water for the chicken noodles then any old tin will work just fine.
Coffee, tea and soup.
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Dump the grilliput, it's a nice little gadget/toy and bit of fun on the campsite but it's not that lite and a bit of a PITA to set up and clean.
I first though this was a total toy but ever since I leave the grill assembled it has proven to be good kit. I leave the tiny feet away and scoop hot coals between two rocks or two logs and set the grilliput on top. Worlks for me. As far as cleaning ... oh well. my idea of cleaning a grill is making it hot over the coals and wipe it with a paper towel or TP .... YMMV!
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Nalgene bottles are great, especially the wide mouth cantene ones that fold up, taking less space when not being used. Wide mouth are easier to fill and you can put ice in them. They're available in different sizes too. I used a couple of the 2L Nalgene widemouth cantene bags and a couple of the 2L Platypus bags (one as a hydration bladder the other as a dirty water bag for filtering) I've since consolidated into a single 4L MSR Dromedary for convenience.
I love my Nalgene bottles but I lost water through the ventilation hole of the cap of the hydration attachment yesterday. The 1ltr bottles fit nicely into my cheapo Polo saddlebags though, so I feel they might come along on the trip.
A good/proper micro-fibre towel is great, they soak up loads and they pack real small and weigh virtually nothing.
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Excellent idea, thanks for the hint!
You're in Europe so I wouldn't go mad on tools as there's lots of mechanics and garages about. Focus on quick temporary fixes for your specific bike. Get EU breakdown cover and just keep it very simple, but definitely take a puncture kit, it can save time money and hassle.
OK!
A multi-tool is excellent but dump the pocket knife as the multi-tool will have one, ....
As a knife nut I feel this will be a challenge for me.
.... dump the voltmeter too, you probably won't use it, if you really need to check a circuit just use a small battery, a bulb and some wire. A head torch is a great idea. Insulating tape and gaffer tape are must have as they'll temporarily fix almost anything, wrap it around a pencil (gaffer tape makes excellent emergency rim tape BTW).
Heavier gage wire (from an old coat hanger will sort you out when the zip ties aint strong enough). Fuses are useful and so is a spare headlight bulb. Some sort of chain lube is needed but not a massive can. I take HKS chain oil in a 100ml squeeze bottle applicator.
The Tool Kit, Chain Kit, Miscellaneous Kit and Puncture Repair Kit | Adventure Vagabond
Laundry: a nice tip for washing clothes is to get a waterproof bag,1/2 fill it with hotish water and soap, put your dirty skivvies in, seal it up, strap to your bike and ride (bumpy roads optional). Stop an hour or so later and voila clean clothes. Squeeze out excess water put them in a mesh bag, strap that to your bike and continue riding. By the time you stop to camp your skivvies are clean and dry.
Dump the extra towels you already have a micro-fibre one. I took a diary but never used it, I usually made a video diary in the evening instead. But a notepad and pen is useful. Consider making up some travel cards to give out to people that you meet. A small first aid kit with personal items is wise (ie your meds, insect repellent etc) and a good supply of ibuprofen will be appreciated in those first few days. You might consider a small sewing kit and a bike cover (for security and for hiding the shiny bits when stealth camping).
I like my old fashioned travel logs as I can read them years later without having to resort to any kind of technology but this is just me. FAK I always carry along with two reflective vests. Sewing kit is another good hint and the bike cover could be a cheapo poncho or green poly tarp.
If you seriously want light weight then the only option is soft luggage, especially if your going off road. There are plastic cases available which is a decent compromise. I personally use TT Zega Pro cases but if I was doing it again with more off roading I would use soft luggage instead. Alu cases are great, but they're heavy and usually expensive. I like the Wolfman range of soft luggage (I have a few pieces and they're excellent) but there are lots of others.
Touratech Zega Pro 38L Black Aluminium Panniers & Accessories | Adventure Vagabond
Pretty much my full kit list here with additions and subtractions:
The Kit | Adventure Vagabond
Good luck and Bon Voyage.