Wow. The biggest pack I have ever done is 140l, that was on my Goldwing. That included 24 cans of beer, and my the top box was still empty... I could have loaded another 100 cans.
I can go anywhere with 100l of pack including camping gear.
I need to take some packing lessons from you. I will admit that I could downsize the top case, but it's super convenient for random stuff that I like to have easily accessible like food, water, heated gear, laptop, etc.