You want close racing? Try this
Japanese sport of Autorace (even though it has precisely nothing to do with cars) can produce ridiculously close racing. The 600cc tarmac oval machines, with the left handlebar raised way higher than the right for the cambered anticlockwise track, fairly get along. Have a look at this. Go to https://www.youtube.com/watch?v=ygybmar2i0, or key in autorace.