What you brings depends somewhat on what you ride and a lot on how (on/off road) and where (far away from civilization) you are going to ride. If it is the DRZ and it is well maintained prior to departure, I wouldn't bring most on the motorcycle parts you have listed - either because you probably won't need it, or because it's easy to get most places. Decide on how most stuff you what to ride with (volume and weight), and cut down the list until it fits the bill. When I do long distance/several weeks travel on two wheels, bring camping gear and want to live in comfort, I bring approx 40 lbs. of gear that takes up 80-90 liters of space. Don't bring stuff that you might need, only stuff you know you are going to need - you are travelling in the US not some out-of-the-way 3rd world country - if you discover that you need something you didn't bring, buy it along the way.