Hi Kevdog
Here’s my suggestions.
Bike
* You have new tires, so that eliminates that one.
* Do a complete service before you leave for your trip.
* Basic tools and tire repair kit
* Quart of oil
Clothing
* Leathers
* Rain Gear
* 2 pairs of jeans
* 2 or 3 T-shirts
* 1 long sleeved shirt or sweater
* Socks and underwear (bring extra socks)
Miscellaneous
* Soap, Shampoo, toothbrush, etc
* Maps
* Cell Phone
* Camera
You didn’t say what kind of luggage you were using, so pack your oil, tool kit, leathers and rain gear first. The amount of room left over is the space you have left to bring the other stuff. You’ll probably be buying a couple of t-shirts along the way, so you only need to bring 2 or 3. If I’m travelling to a specific destination, I pack the oldest, grubbiest t-shirts I have and toss them out as I buy new ones.
If you’re going through Yellowstone, it takes about 3 hours to go through the park from the west gate to the east gate and they won’t let you camp in a tent because of the bears. We timed our trip so that we camped on the west side of the gate the night before, and spent most of the day in the park and camped on the east side in Cody, WY the next night.
Hope this helps.
Enjoy the ride