Is there any website that tracks records for the 50cc and 100cc cups?

i too have an interest in this, if anyone knows if this even exists.

I agree. It does sound very interesting.

50cc and 100cc are generally considered just slow versions of 150cc. I know that sounds obvious, but 200cc uses very different strats from 150cc, for example, while 50cc and 100cc would just be 150cc but with more waiting. They're tedious and boring without anything to set them apart. Also, unlike 150cc and 200cc, there's no competitive scene for 50cc or 100cc, and no high-level player ever seriously plays anything slower than 150cc.

I realized I didn't actually answer the question, sorry (although it's probably obvious from my response lol) - I don't think there is any site that tracks 50 or 100cc speedruns of any kind, and we have no plans to add them here.

fair, tbh. i figured this was the case but i had a little bit of hope seeing that there was someone other than me at least interested. thanks for replying!

Thanks!