For your resource guide I would say between the posts from Thumper and I you should have all the photos and instructions you need for the re-jetting and shimming of the carburetor and the size replacement bolts for the ones that need removing as well as removing the aluminum air pilot adjustment screw plug for your resource guide. I mostly just added mine to Thumper's separate post on the subject and then have other build photos and details on my own post.
The safest chain size to recommend without knowing what sprocket sizes people are changing to would be the 120 link RK SO chain.
RK Racing Chain 520-SO-120 (520 Series) Steel 120 Link Traditional Street and Off-Road O-Ring Chain with Connecting Link
https://www.amazon.com/RK-Racing-Cha...007A8OSKS?th=1
Tires I have not worn my factory OEM knobbies out yet. I had originally planned for 70/30 Shinko 705 Series Dual Sport Tires for a name brand tire. For a cheap no name tire from Amazon I don't know, I have not studied any of the off-brand tires yet.
705 Series Dual Sport
https://shinkotireusa.com/product/705-series-dual-sport-tire/211929