For drag racing you will need.
Helmet with clear visor
Leather over ankle shoes or boots
If your bike will trap faster than 120mph add
Leather jacket and pants
Tether Kill switch
If 9.99 or faster probably NHRA Liscense
Some tracks are more lenient and some are more strict. This is just of a guideline from what I have found...
Oh and most tracks dont run cars and bikes together. Personally I wouldn't want to race cars. All you would need would be for some hotrod car get all out of shape and cross lanes and smack ya and it would be all over...
We race cars all the time. No problem with that. And many times, most cars are slower than you on the track...
But did get to see a camaro do exactly that this past weekend. but it was up against a zx10 so no problem in that area
Never been on one (none on my f**king island) but I would say u need the best protective gear u can get, even a neck protector, as its not like on the track that if u fall off u slide for some time and then thats mostly it, on the drag strips which I've seen on vid clips they have walls on the side and if somebody hits against one of them....
(do drag strips normaly have a checklist of minimum gear u have to wear ? thats what I think would be wise to do)