Mark,
Since I was camping with Alex for scouts when the rules were finalized, I can’t fully answer your questions. Historically, we’ve not allowed the low profile front tires due to the non-scale appearance. I expect that to continue which would eliminate the 17×8 zero grip NSR tires. All of my NSR 917Ks have the black motor pod so I’m not sure that the red is the stock spec. If anyone has a newer 917, perhaps they can help us out. According to the post you made on Monday, gears are open. Somewhere I remember seeing that we’re allowing the NSR screw in guide. Since people were wanting to keep the costs low, I would say the stock oilite bearings to be retained. This whole keeping costs down on a NSR series is still baffling to me but whatever. The rear tires are to be the stock tires but can be trued which eliminates the “tread” on them. Again this is from your post on Monday.
I’m confused why you’re asking me about the finer details on the rules as that didn’t seem to stop everyone from making those changes to the rules without my input.