In motocross racing, what do Hwt and Lwt mean?

Question

As you can see, I am a rookie...

Answer 1

It refers to the racing classes that some racing organizations use.  250 cc or less is the light weight class, 251 cc and larger is the heavyweight class.

Answer 2

No, it means......."Ham with tomatoes" and "Lettuce with tomatoes"

Answer 3

i believe it has to do with the weight of the oils used.

H meaning heavy and the wt meaning weight

L then would mean light....